Malicious PDF — malware analysis report

Static analysis result for SHA-256 a589be68ae5d8c53…

MALICIOUS

PDF

568.1 KB Created: 2021-05-22 03:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e06659d6f73e86fa7b3ac1da322b10a5 SHA-1: 3f058be47ac6abcde15e29f77f4b6cd21db2bca1 SHA-256: a589be68ae5d8c530b59a895b7d8b5eb191ace67d8233ffb486007ca384df2a3
364 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA and explicit instructions to copy and paste commands, a pattern commonly used to lure users into executing malicious code. It also links to known malicious redirector infrastructure, suggesting it's part of a phishing campaign. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4517

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Fake CAPTCHA with command-running instructions critical SE_FAKE_CAPTCHA_CLICKFIX
    Document combines fake CAPTCHA or human-verification language with instructions to paste or run a command — a high-confidence ClickFix pattern
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/strik?utm_term=how+to+turn+on+sunbeam+heated+blanket In PDF document text
    • https://xexonuza.weebly.com/uploads/1/3/4/3/134305788/454f009f4a97cc9.pdfIn PDF document text
    • https://moninedowilex.weebly.com/uploads/1/3/1/4/131436981/1390092.pdfIn PDF document text
    • https://vobasonuniba.weebly.com/uploads/1/3/4/6/134668907/jukurawasotiref.pdfIn PDF document text
    • https://lurusinobafor.weebly.com/uploads/1/3/2/7/132710654/8425d.pdfIn PDF document text
    • https://genebametujo.weebly.com/uploads/1/3/4/9/134904617/dca1a406f1b01.pdfIn PDF document text
    • https://vifoxofanope.weebly.com/uploads/1/3/4/6/134670603/nilewaxuwebezizanado.pdfIn PDF document text
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/silifepej_nafunuzabowi_gigig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401697/normal_606ddbdba7bc3.pdfIn PDF document text
    • https://nubonikajifubi.weebly.com/uploads/1/3/4/8/134882340/ed9e20a0b35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_606e5f9e6f493.pdfIn PDF document text
    • https://rezezeveg.weebly.com/uploads/1/3/1/8/131871466/gifabowoneled-roxubemab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447885/normal_602b5fefa41ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383795/normal_60442f3145cee.pdfIn PDF document text
    • https://zudovizu.weebly.com/uploads/1/3/4/3/134338339/tofitit-lowis-ziwiniwenaxube-dojutugez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476943/normal_600ddb0b056b6.pdfIn PDF document text
    • https://lulotabo.weebly.com/uploads/1/3/4/7/134745182/2890342.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/linksys_wrt160n_v2_firmware_upgrade_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f84dc51-f08f-4378-8dc1-95fea05e1d3a/9751770757.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29bdbe65-f13e-43f3-8ca5-03e113e0fdeb/fezugakoleka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e75b4132-99af-4ad6-a61d-6a98215fde1c/how_to_crack_minecraft_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/lutuzavimimagopemutefunod.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/astrid_s_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/hearthstone_boomsday_project_solo_adventure_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab4d2fbd-d311-4764-b139-e82ed6172854/9055737952.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/37585869468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af0481e9-93d6-4158-a171-534e31b352ab/tezulosive.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off00081c4e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x81C4E 3940 bytes
SHA-256: 6cdeb7741ca972045dbce4b38085ffb7b5b90494aafdd984b038dd4067dc385e
font_00_sfnt_off00080bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80BF8 6600 bytes
SHA-256: 48ad885adf31cd16fee4fde7bab2449c4fd5717e8e461a85802a724b31b70643
font_02_sfnt_off00082a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A46 5324 bytes
SHA-256: c34aba184b77cc985061df244da71f0578e8df47fac8a105adfc28c23f781d3c
font_03_sfnt_off00083c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C3D 2080 bytes
SHA-256: 3c44fbf49af8c878ef6521ea13f25eec4a7964ac1d1e6d8a501581755397ec8a
font_04_sfnt_off0008460c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8460C 10616 bytes
SHA-256: 0f918dcb8443cd784639f9cc7a2507c696b1160ce150b1121e287a09772cfff1
font_05_sfnt_off000863bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x863BC 22292 bytes
SHA-256: 2b67b353e9dfb47c0c8d39ea0078dedf7772b2395013394927c621c22d7bf940
font_06_sfnt_off0008a698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A698 16840 bytes
SHA-256: 0c4e8ef96951b993359e57c8a41bfd50da57162581c0094ab3069f5092551e2c
font_07_sfnt_off0008bdd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDD3 6288 bytes
SHA-256: 286415d56ef3ea0c032f88617058e6fbe58072204e3479fcc982b860e6febc3b

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