Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ed388163d5beb0…

MALICIOUS

PDF

52.6 KB Created: 2020-12-11 16:15:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9eff26eb36ce7b9f784b7dc75ff6de7b SHA-1: 7701748bcdb91ea3442065a43fdff6f49e85d73e SHA-256: 82ed388163d5beb0e3332e0d0dc167a85d84a9362a02f07bfffb0b5b4a5d01fa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are to PDF files with numeric slugs, indicating a link farm for SEO purposes. One of the embedded URLs, https://trafficel.ru/aws?utm_term=sensory+neurons+carry+information+to+the+brain, is suspicious. ClamAV also detected this file as Pdf.Phishing.Trojan. The presence of embedded URLs and the link farm structure suggest an attempt to direct users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6897

Heuristics 4

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/aws?utm_term=sensory+neurons+carry+information+to+the+brain
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5f994b053d550.pdf
    • https://zatimitopefavig.weebly.com/uploads/1/3/4/6/134614657/228312a.pdf
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/xozewamar.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3a314f98375720aba485/1606302257360/38500328570.pdf
    • https://static1.squarespace.com/static/5fc4eac35e8e827d42a79265/t/5fc6591cf3de5e49b53df1ae/1606834460638/ralphs_delivery_charge.pdf
    • https://static1.squarespace.com/static/5fc0d00e405d5340f3291e5b/t/5fc4d1004f983757207698c4/1606734081646/splatoon_2_beginners_guide_reddit.pdf
    • https://static1.squarespace.com/static/5fc1ceb7bdb33045eec8b031/t/5fd02e0ea91a8d2433720e1c/1607478800906/war_heroes_strategy_card_game_mod.pdf
    • https://static1.squarespace.com/static/5fc6902f2bbd7406582dc6c6/t/5fca526e56557d544bfa2c61/1607094895436/tinusitiku.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0067d334513fae4299a4/1606221928016/64234734461.pdf

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