Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad61b8e4c7ce4a4…

MALICIOUS

PDF

58.6 KB Created: 2021-03-12 05:52:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5637dffc9d65baf19bbdab5dec865271 SHA-1: dcb755c30ad45eab3873d2bdc30b9a3d577f03ee SHA-256: 6ad61b8e4c7ce4a4dafff378d066f910170434d832bd2738b4a05ae4c0eae735
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious, likely a phishing lure, due to its structure resembling an image-only document with clickable actions. It contains numerous embedded URLs, including a link farm, suggesting an attempt to redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6927

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 58 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://xajibur.ru/award?keyword=informe+sobre+calicatas+pdf
    • https://ludugekokokak.weebly.com/uploads/1/3/5/3/135313409/1ddedc40e4565cc.pdf
    • https://zakupiza.weebly.com/uploads/1/3/5/9/135960967/3864074.pdf
    • http://wavapivanuf.scienceontheweb.net/31486080448.pdf
    • https://wapexuji.weebly.com/uploads/1/3/5/3/135329723/1730366.pdf
    • https://nenilinuda.weebly.com/uploads/1/3/1/3/131383514/310064212.pdf
    • https://zobanegasub.weebly.com/uploads/1/3/1/1/131164549/4981521.pdf
    • https://nawenakugod.weebly.com/uploads/1/3/6/0/136048640/025f8a991b0d6.pdf
    • http://tiriruno.sportsontheweb.net/xuwivapotuvovoposojev.pdf
    • https://xasukibumit.weebly.com/uploads/1/3/4/7/134749231/2fc4c254fe65b.pdf
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/62a8d954b90af.pdf
    • https://subifegeriw.weebly.com/uploads/1/3/5/3/135348524/713b2729a.pdf
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_bba595a6bc0549c6879f93ec1243e665.pdf?index=true
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_4fb9b84a0ee74761b7157b57b8408998.pdf?index=true
    • https://746420f6-3007-491b-ba72-fd43be5094e5.filesusr.com/ugd/277b62_4b5084fa01074752ab3cd5411ecc00e3.pdf?index=true
    • http://relivoziz.atwebpages.com/diesel_electronic_fuel_injection_system.pdf
    • http://livirava.atwebpages.com/jumitosanusov.pdf
    • http://vejegaba.atwebpages.com/why_did_the_spanish_establish_missions_in_texas.pdf
    • https://27420876-d215-4860-9a72-f48db0d0c320.filesusr.com/ugd/4062c2_1256227a5db441bda6985fed2118b1d6.pdf?index=true
    • https://7893bdd6-41e4-48f6-9953-3a636dfb5d61.filesusr.com/ugd/c5c63b_c815de1da8454532bd643a1cbebeced1.pdf?index=true

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