Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d818e9cd95da33a…

MALICIOUS

PDF

110.7 KB Created: 2020-12-18 13:42:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b29c400514133f897bb4f483bf52dc7 SHA-1: d94d380ee45184ea2964057f38eef414aaa5b663 SHA-256: 6d818e9cd95da33a5b0d740324c9ca0337f8b421c86e0fb15ffd5a7a9ab8bf11
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ML classifiers and ClamAV as malicious. It contains an embedded URL pointing to 'trafffi.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a game walkthrough, consistent with social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://trafffi.ru/strik?utm_term=eternal+duelist+soul+walkthrough
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5fa1fb917636f.pdf
    • https://cdn-cms.f-static.net/uploads/4392658/normal_5fa6e123592b0.pdf
    • https://cdn-cms.f-static.net/uploads/4369302/normal_5f89cf46b270d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5dd00aeb-4ac4-4874-afbd-6068308549ab/rm_125_manual.pdf
    • https://static1.squarespace.com/static/5fc0f1dfe9fc3622d5225d5f/t/5fd21e96880fa23343dc0023/1607605910942/topogakevegulugilovemaxo.pdf
    • https://uploads.strikinglycdn.com/files/d8c5e9d3-0eac-429b-82c6-6d07eb2d17ac/kevizulenunebuku.pdf
    • https://s3.amazonaws.com/somisilegex/kexapuzubowezonojozenojet.pdf
    • https://static1.squarespace.com/static/5fc6463427a199023ad9da39/t/5fcd66742fa8bc6bcdfc92cd/1607296628282/77368074161.pdf
    • https://s3.amazonaws.com/kavitokolezub/29619618482.pdf
    • https://s3.amazonaws.com/mexavofezoxi/braun_thermoscan_7_irt_6520_manual.pdf
    • https://uploads.strikinglycdn.com/files/c75e28ee-0952-4b73-9ab6-c5c3933dd10b/rubik_s_cube_4x4_debutant.pdf
    • https://uploads.strikinglycdn.com/files/6945601f-6139-4654-8d27-cc3093707530/google_analytics_for_personal_website.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017411.bin
5c2caa5053534f0e6521f3b43bb01db1a557d8e5b9d20a06243302e9acc1b9a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17411 5200 bytes
font_01_sfnt_off000185ce.bin
f22f3e4a9999500f74ec00ca99220cf7dc48cf2ec472e7db6f4546a2969d67a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x185CE 11764 bytes

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