Malicious PDF — malware analysis report

Static analysis result for SHA-256 c89067a51efa7558…

MALICIOUS

PDF

88.7 KB Created: 2021-06-11 06:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f4f54cd19150cddf521c45568b24416c SHA-1: c473a1a9a57b3d40045da0ea25b8de6b7d754739 SHA-256: c89067a51efa75585fb4ae6fbc27603918579f081a993f55f2d3d22554de119f
254 Risk Score

Malware Insights

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

This PDF document is identified as a credential phishing lure impersonating the Instagram brand. It contains numerous external links, many pointing to disposable hosting services, designed to lead users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to steal user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://xovawezovikax.weebly.com/uploads/1/3/0/9/130969403/padadafuminef.pdf.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://catamma.ru/pbw?utm_term=pokemon+go+apk+joystick+2020 PDF link annotation
    • https://xovawezovikax.weebly.com/uploads/1/3/0/9/130969403/padadafuminef.pdfIn PDF document text
    • https://rafukamilijodif.weebly.com/uploads/1/3/7/5/137509327/7482566.pdfIn PDF document text
    • https://nubugudapo.weebly.com/uploads/1/3/2/8/132814946/gutox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477615/normal_6030f91e3f073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386354/normal_6059c36e1dbe1.pdfIn PDF document text
    • https://pegutezupo.weebly.com/uploads/1/3/2/7/132740329/bovadatolu.pdfIn PDF document text
    • https://wadidomewagu.weebly.com/uploads/1/3/2/6/132681938/mewel_nujaneses_pigiju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455195/normal_603cae12e6a0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500883/normal_5ff4c1f29bc94.pdfIn PDF document text
    • https://fogufufizanalu.weebly.com/uploads/1/3/0/8/130813948/pokoxasufowu.pdfIn PDF document text
    • https://kijesutezex.weebly.com/uploads/1/3/5/3/135328712/5df8dce025b5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jetubabup.pbworks.com/w/file/fetch/144619131/buy_real_active_instagram_followers_cheap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8946a384-1b51-4c59-a80f-a856f2c114fe/31772553106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16851cfa-5144-4b90-8458-85d88afd4296/derecho_romano-germnico_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9d8372f-d59e-4091-ab32-5ed20e763d4a/57342646884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dacf270-314a-4938-acea-8468d1a04c9e/84123698368.pdfIn PDF document text
    • http://rawumadakora.pbworks.com/w/file/fetch/144538203/85524198934.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC7 6588 bytes
SHA-256: fa72874b8c381873b432d3b5cea9ecddba20f04e8e1c9face7d560df1136061a
font_01_sfnt_off0000ee41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE41 5428 bytes
SHA-256: c0fb8415528fe783e2520d6fe1d69dd8b49579de1cf01d6c59af1fe25d5ca5ac
font_02_sfnt_off000100ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AD 2052 bytes
SHA-256: a98bccc0198958cc9e1dbd98b0fc3a5b675acc3cc1276b3c1dfa9dd75f0b5912
font_03_sfnt_off00010a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5E 11044 bytes
SHA-256: c5c3170fd1009a5fe21ce0977ac32e73577048eaf12890cda26714399c45ff52
font_04_sfnt_off00013010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13010 16064 bytes
SHA-256: b62d59e71cb992cbb1cf975596b12a6a103251f34ba85435f827c601649a922d
font_05_sfnt_off000144b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144B4 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71