Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa54e4bf707a6d4…

MALICIOUS

PDF

41.6 KB Created: 2020-12-01 17:46:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db7e0e2ae021cd6a548db7fcead746fd SHA-1: eefbb31c6506a80e4dc42fddc2082d122b29ec1e SHA-256: 9aa54e4bf707a6d4a6e9deebf79e9b68f0f73ef55bbfb86275fbec58f884df75
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The PDF_IMAGE_LURE heuristic indicates it likely contains a screenshot designed to trick users into clicking an embedded link, such as the one found pointing to 'https://trafffe.ru/aws?utm_term=initial+jobless+claims+report'. The PDF_SEO_LINK_FARM heuristic reveals a large number of external PDF links, suggesting a tactic to distribute malicious content or engage in link farming. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8368

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 41 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://trafffe.ru/aws?utm_term=initial+jobless+claims+report
    • https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/a2f42b.pdf
    • https://cdn-cms.f-static.net/uploads/4388421/normal_5f9a3f73a7e64.pdf
    • https://cdn-cms.f-static.net/uploads/4383565/normal_5fa011e2d468d.pdf
    • https://cdn-cms.f-static.net/uploads/4444655/normal_5fc1ac0e589eb.pdf
    • https://luwamagol.weebly.com/uploads/1/3/4/3/134375262/01971e0e05e0b9f.pdf
    • https://moxoviwepikiwu.weebly.com/uploads/1/3/2/8/132814726/sexuju-gemefa-wusalaximogo.pdf
    • https://bezoduremudopez.weebly.com/uploads/1/3/1/4/131437412/1188470.pdf
    • https://uploads.strikinglycdn.com/files/a8e8fd5f-ea8a-42e2-9957-2b190ce8c685/xabemiguja.pdf
    • https://uploads.strikinglycdn.com/files/896b8713-c08f-4c80-928f-74ea9f79a6c2/ford_2000_tractor_manual.pdf
    • https://uploads.strikinglycdn.com/files/ca922317-1156-4d69-86ee-dc55e91ba490/15052312606.pdf
    • https://uploads.strikinglycdn.com/files/6978b4a5-b080-43ed-9656-30220d99fe1a/nattupura_pattu_tamil_movie_songs_free_download.pdf
    • https://uploads.strikinglycdn.com/files/138e0e67-390d-4470-9565-bfd244cad581/kaxisowubovijex.pdf
    • https://uploads.strikinglycdn.com/files/8037a180-32fb-4feb-ba20-1e30bff2bc54/guild_master_skyrim_mod.pdf
    • https://uploads.strikinglycdn.com/files/17f46549-2e8a-4863-a2a0-f6812c09b58d/fixulevukurofew.pdf
    • https://uploads.strikinglycdn.com/files/07aa8410-76e6-4e1f-996c-a46dd0be8e00/63672070462.pdf

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