Malicious PDF — malware analysis report

Static analysis result for SHA-256 28c2fa0af0c54dd4…

MALICIOUS

PDF

66.5 KB Created: 2020-12-27 19:41:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8954347a785783b9836164952971f4f0 SHA-1: bd9adf258489941093a824b6f8792fec2bc372d4 SHA-256: 28c2fa0af0c54dd48010bc6e463ca40ecc53443ecbccb3b327294f6f0610b78c
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL pointing to 'trafftec.ru', which is flagged by heuristics as an external URI and part of a phishing attempt. ClamAV detection further confirms its malicious nature, identifying it as 'Pdf.Phishing.Trojan'. The ML classifier also strongly indicates maliciousness. The document body appears to be heavily obfuscated or corrupted, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/aws?utm_term=bhajan+song++mr+jatt
    • https://cdn-cms.f-static.net/uploads/4373797/normal_5f9aac049b51d.pdf
    • https://cdn-cms.f-static.net/uploads/4401972/normal_5f9910e4f0523.pdf
    • https://cdn.sqhk.co/vudebalox/itjgZhe/vofiwotupijafifaj.pdf
    • https://cdn-cms.f-static.net/uploads/4415065/normal_5f9dd21cba497.pdf
    • https://cdn-cms.f-static.net/uploads/4446162/normal_5fa22140c04b7.pdf
    • https://cdn-cms.f-static.net/uploads/4369498/normal_5f883f7334544.pdf
    • https://cdn-cms.f-static.net/uploads/4384028/normal_5fbcaae07aa2b.pdf
    • https://cdn.sqhk.co/vefutifeves/ifgfhe8/fesedutativa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vapite/nugodiv.pdf
    • https://s3.amazonaws.com/zalomi/bacillus_thuringiensis_pesticide.pdf
    • https://s3.amazonaws.com/nilafafakem/xiwiwepudogapan.pdf
    • https://s3.amazonaws.com/leteraxewe/xawegawobusuvetudigaw.pdf
    • https://uploads.strikinglycdn.com/files/6f4d9cab-2915-4ee2-952b-53599e39583a/37452626609.pdf
    • https://s3.amazonaws.com/gewuwasi/luxogimilidofe.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_off0000c4eb.bin
7a8f235cb478ac434a3ec54c87ec07b6ef183cbf5461f6bc0ebb954f1e0d744a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4EB 5192 bytes
font_01_sfnt_off0000d672.bin
280b0ea9b71e00b0c8aeff4e0ef99699849575fcdf45c3e0021eeec77a33af18		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD672 11868 bytes

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