Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf4b96ac8520505…

MALICIOUS

PDF

175.9 KB Created: 2021-03-28 13:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d5b50b585c6fc3d25e159ba243d00438 SHA-1: a8acda2d3c375b29f19c866e2651e9e343358eac SHA-256: 1cf4b96ac8520505945cb5bf54546a412ea57d82b63bdc7bb69d297316467255
164 Risk Score

Malware Insights

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

The PDF contains a heuristic indicating an external URI pointing to a suspicious domain, likely a lure for a malicious download. The presence of a 'password-protected archive handoff' heuristic suggests the document is designed to trick the user into believing they need a password for a downloaded file, a common tactic in phishing and scam operations. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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=the+twilight+saga+new+moon+hindi+hd+download PDF link annotation
    • http://tomandbxof.site/adidas_yeezy_500_utility_black_retail_pricekrpwy.pdfIn PDF document text
    • http://domavera.ru/nakama_1_workbooktr2qo.pdfIn PDF document text
    • http://hurleyshamburgers.com/new_anime_stickers_for_whatsapp_2020qhc52.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/icifhgr/53365849297.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/Gzgijem/u_by_bb_t_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zunezafi/iiMif38/football_coaching_sessions_for_5_year_olds.pdfIn PDF document text
    • http://sweetygirl.club/xonivo5achr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/stihl_ms_180_c_spare_parts.pdfIn PDF document text
    • https://e4da1597-3bb3-488b-9226-7c2c9e06e9ce.filesusr.com/ugd/db5d73_73bf8e125ca8475681a9f68ae155b6bf.pdf?index=trueIn PDF document text
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_799b4047debc4e9b8fe1a28bb7a1014b.pdf?index=trueIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_eeb311df8b314d5883bf59b0e21d8091.pdf?index=trueIn PDF document text
    • https://7e079b21-6cfc-4bbc-a8af-001f4930a7f2.filesusr.com/ugd/f66805_acb3a9ad683f41659ddda5e31c63f158.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupuxus/android_update_google_account_password.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/71300513437.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/56098254962.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/bowovuboja.pdfIn PDF document text
    • https://cd5075e9-4951-46bd-8d13-413fdd501c9b.filesusr.com/ugd/eceaf1_ff4d86363e0d4e27ab53b52ef8f0bdfd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/girlfriends_guide_to_divorce_cast_charlie.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/37843438808.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24EBC 6644 bytes
SHA-256: 3c0cf8cf911627e4b0f6f6abc47ac39f5136ae16be5fee37b76642a6fe3d50fd
font_01_sfnt_off00025f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25F19 5184 bytes
SHA-256: fee4e1a220783e7e8204b8899386833b055564ec3b13c682e1757915217f439c
font_02_sfnt_off000270aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x270AA 12600 bytes
SHA-256: 694d63793f164a398fd3bf5cb7d5620ba888c59866d02672232131e02a24d699
font_03_sfnt_off00029be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29BE4 16076 bytes
SHA-256: 77d0e41b193f2956426f125f137c5665e22c2099967b8d3a504bff5b234847bc

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