Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef55e8b23850d294…

MALICIOUS

PDF

49.6 KB Created: 2021-03-25 20:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45cce5c60998fe9e3981fd01af202529 SHA-1: f286d5db00aa20f0f097a0ef8c3906f50299b3cd SHA-256: ef55e8b23850d2948ea6fab5b70fac1ac40b9cf3b7a1db5f03e73fc97516af96
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as a phishing lure due to its image-heavy nature and a single clickable action. It contains numerous external links, with a primary suspicious URL pointing to 'bologen.ru'. The ClamAV detection and ML classifier further support its malicious classification, suggesting it's designed to redirect users to potentially harmful content or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7209

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 49 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://bologen.ru/aws?utm_term=tipping+point+apes
    • https://cdn-cms.f-static.net/uploads/4368985/normal_603917d015304.pdf
    • https://static.s123-cdn-static.com/uploads/4402244/normal_6004bcc39d65d.pdf
    • https://static.s123-cdn-static.com/uploads/4453129/normal_5fc99d81d33be.pdf
    • https://static.s123-cdn-static.com/uploads/4480886/normal_5fde44590fbc6.pdf
    • https://cdn-cms.f-static.net/uploads/4374704/normal_604ce0fa1c3e1.pdf
    • https://cdn-cms.f-static.net/uploads/4403120/normal_6056e952eda76.pdf
    • https://static.s123-cdn-static.com/uploads/4374540/normal_5fcd289333753.pdf
    • https://static.s123-cdn-static.com/uploads/4471250/normal_5fd064e8dde8f.pdf
    • https://static.s123-cdn-static.com/uploads/4501057/normal_5fde6c225fb2c.pdf
    • https://cdn-cms.f-static.net/uploads/4489981/normal_60264e8ae778d.pdf
    • https://uploads.strikinglycdn.com/files/c6acbbdd-28a8-44a0-9298-c59b40aa0098/93761061151.pdf
    • https://6323cc82-cf72-43ae-bc7a-f8d691a1d37e.filesusr.com/ugd/4f3578_914079de369e42d6b8da79b108df7ca7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/48e2dfc5-0f34-4ea1-93e5-17885316f251/what_is_chelsea_news_today.pdf
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    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_eb921edc205841a4a8489d224819d04c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3bed46f4-0dea-4b1c-80a3-7ceafe05b0c4/1_centimetro_cubico_cuantos_metros_cubicos_son.pdf
    • http://fudavifakafolid.rf.gd/wovumotijivupamugapitew.pdf
    • https://94ac7338-8c66-48ed-b7e4-01cccba3eff0.filesusr.com/ugd/9b8421_28ffdef99c094d8fb08a05c9446e8386.pdf?index=true
    • https://uploads.strikinglycdn.com/files/18a03088-f640-42da-9242-2d31561615b9/jevelimekipisududibinafa.pdf
    • http://zewivijususilub.epizy.com/dinetizegugej.pdf