Malicious PDF — malware analysis report

Static analysis result for SHA-256 c188e366054ae83f…

MALICIOUS

PDF

55.8 KB Created: 2021-03-24 11:02:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8198be395260f75833d2cbe91e71784 SHA-1: 2bca5a970c5e5aa739fc1aa9797dd469b5474635 SHA-256: c188e366054ae83fc5523ecf5d9fe7bed4009f4e836fbab60fc8e818bdab4ff6
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-only content, typical of a screenshot designed to hide clickable links. It contains numerous external links, including one to 'dugedepap.ru', which is suspicious. ClamAV also detected it as 'Pdf.Phishing.Trojan'. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7030

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 55 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://dugedepap.ru/award?keyword=apache+spark+architecture+pdf
    • http://fineagencyy.com/interior_and_exterior_angles_worksheet_15-_1h16i7.pdf
    • http://gayerkan.com/64715416442nq8pr.pdf
    • http://fapenas.22web.org/big_friendly_giant_full_movie_in_hindi_download_filmyzilla.pdf
    • https://bupedokan.weebly.com/uploads/1/3/1/6/131607930/xipubofuruwiduta.pdf
    • http://gabasikekapubul.iblogger.org/xibibubolefobexoraleda.pdf
    • http://useporte.xyz/bubbles_game_freedkkj5.pdf
    • http://situbune.iblogger.org/formative_assessments_for_special_education_students.pdf
    • https://gimitowogavu.weebly.com/uploads/1/3/4/7/134746983/rolut.pdf
    • https://rimokukesezawuk.weebly.com/uploads/1/3/1/4/131437069/nuveka_vitamef.pdf
    • https://rilavowa.weebly.com/uploads/1/3/2/7/132740415/a3f22.pdf
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/7148218.pdf
    • https://s3.amazonaws.com/wezukep/applied_ballistics.pdf
    • https://s3.amazonaws.com/figidireki/luxury_lifestyle_report_llc.pdf
    • http://diresudavu.rf.gd/2005_honda_civic_service_owners_manual.pdf
    • https://s3.amazonaws.com/nemafu/lokanuxim.pdf
    • https://s3.amazonaws.com/tuzakifezara/savog.pdf
    • https://dc010c70-835d-4b56-8cb0-1e1bda7cab64.filesusr.com/ugd/fb576b_10bd2e7b466044c19373ccbb8467f244.pdf?index=true
    • https://6c9aa500-f8d9-42a6-b8a4-5b3c562bbfc3.filesusr.com/ugd/543886_afbe3da8e3a842858f7c56ed6844a53c.pdf?index=true
    • https://86146b48-cf95-488a-b5a0-22832f4589a6.filesusr.com/ugd/3b4eee_3116d871f74c4395b27669f754c2c611.pdf?index=true
    • https://f4a80ce2-0a24-44e2-aff7-13c87a434ee9.filesusr.com/ugd/ace063_2c9c2ad84c284e04871f6cc49ce42dfe.pdf?index=true

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