Malicious PDF — malware analysis report

Static analysis result for SHA-256 a972b9b165003abf…

MALICIOUS

PDF

61.8 KB Created: 2021-03-28 07:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f65b23af4fcde0d6416e579e9cae8e25 SHA-1: ac3c25474dd5c19e787e8675fd3b8d32c49e53bc SHA-256: a972b9b165003abf9aa28322aa27d2dc99cdfa1eeda7f1afb6a53217b65b0ba1
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical for phishing campaigns. It contains a link farm with numerous external PDF links, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The ClamAV detection and heuristic firings strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3565

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 61 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://baarspo.ru/strik?utm_term=what+is+the+correct+definition+of+compare+and+contrast
    • https://mazaxijav.weebly.com/uploads/1/3/4/4/134488449/5973811.pdf
    • https://cdn-cms.f-static.net/uploads/4482218/normal_603bea4369cd5.pdf
    • http://hesap-al-sat.com/simufugubcjk8s.pdf
    • https://livadasim.weebly.com/uploads/1/3/4/3/134312527/zegagepefuzexusa.pdf
    • https://cdn-cms.f-static.net/uploads/4472186/normal_605d8ebcb11c0.pdf
    • http://sberbank.link/golf_video_games_2020_xbox_oneug24w.pdf
    • http://uggi-ugg.com/19953931497cuqjh.pdf
    • https://cdn-cms.f-static.net/uploads/4383928/normal_5fdbdbad1f1d5.pdf
    • https://cdn-cms.f-static.net/uploads/4482190/normal_6044d02b18753.pdf
    • https://static.s123-cdn-static.com/uploads/4406806/normal_5fde78980e191.pdf
    • https://cdn-cms.f-static.net/uploads/4476268/normal_5fe9dd8dbb093.pdf
    • https://cdn-cms.f-static.net/uploads/4409256/normal_5fd2e41b9b251.pdf
    • https://rikelakejif.weebly.com/uploads/1/3/4/8/134885243/af735c892398.pdf
    • https://static.s123-cdn-static.com/uploads/4410016/normal_5ff7aa20c8136.pdf
    • https://warexuzema.weebly.com/uploads/1/3/4/6/134601764/7f9ecaa1dfe82.pdf
    • https://bodonovovo.weebly.com/uploads/1/3/1/6/131607174/f2184ec1bd17d2.pdf
    • http://chtotakoevuxom.biz/sample_self_assessment_essaygi1rl.pdf
    • http://inostrana.com/36133871864yv6wr.pdf
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_01a115309836481e91f03a28fb9301c5.pdf?index=true
    • https://e1d5fa5a-667c-4d22-bb72-2ec96b4ed0f7.filesusr.com/ugd/01f30d_5dc5b858ddbc4c2897f155def104f020.pdf?index=true
    • https://e57d8632-f742-4524-ada6-9cdf759d9f13.filesusr.com/ugd/b0cb2d_a344cc966a09418ba39e5b6218ee88b2.pdf?index=true
    • https://e5baaea7-7007-41de-9367-4ebf3ed55875.filesusr.com/ugd/8e1900_62262dd4522d43b3bbe72831d7425fec.pdf?index=true
    • https://53002a68-e35f-4167-ac88-1ab9777d7e72.filesusr.com/ugd/f5bc2a_ea0c0aca26de43cc8a8b46878a66d95b.pdf?index=true
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_3817e07dbcb942b8869c5aad0a172afb.pdf?index=true
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_336035b66b414c9a8a0575bc3f664b3c.pdf?index=true
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_bcbfde145f48419f96e6cb030b07d436.pdf?index=true
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_2a872cb987bb4aaa9318e58ba41149b3.pdf?index=true

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