Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b2f7022f109627…

MALICIOUS

PDF

66.4 KB Created: 2020-11-25 23:22:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5417de9b28f23bf784767859a384fade SHA-1: 7c64b45cef1b135ca364c7c0252e5baf119c1dd2 SHA-256: 42b2f7022f10962798a2e564d1ee4455201d24fcf3ea219ed7eb607278d72b13
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafffi.ru', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to educational content, a common tactic for social engineering.

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://trafffi.ru/123?utm_term=understanding+points+lines+and+planes
    • https://cdn-cms.f-static.net/uploads/4404515/normal_5f93e0704c103.pdf
    • https://cdn-cms.f-static.net/uploads/4454677/normal_5fa629a37c25b.pdf
    • https://cdn-cms.f-static.net/uploads/4504839/normal_5fb96a463c973.pdf
    • https://cdn-cms.f-static.net/uploads/4368732/normal_5f9d6058ba92e.pdf
    • https://cdn-cms.f-static.net/uploads/4421335/normal_5f9a8aaa86c88.pdf
    • https://cdn-cms.f-static.net/uploads/4420760/normal_5fb37d5bc6ca1.pdf
    • https://cdn-cms.f-static.net/uploads/4403556/normal_5f98bdbfc502b.pdf
    • https://cdn-cms.f-static.net/uploads/4456116/normal_5fa0828b4239d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pevarijidasalop/luribupogafawozo.pdf
    • https://uploads.strikinglycdn.com/files/79731cef-5aed-4ecc-b249-e0cf44054a41/ap_statistics_test_5c_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/25ab83f8-dda7-46f0-9692-589cbf380180/tavarizizufuz.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_off0000cc04.bin
757b17fe6742a687650a4e81d62a8de3dd4d932091f9da86ce7cc2b3d99d93f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC04 5116 bytes
font_01_sfnt_off0000dd79.bin
7aa4ce768b3ea30f95c27ceb8175d45f9982f09dea0cd439028f20787fb296fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD79 9224 bytes

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