Malicious PDF — malware analysis report

Static analysis result for SHA-256 007feb94671f38d6…

MALICIOUS

PDF

70.4 KB Created: 2020-12-29 21:48:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0ad6621243f42c832b2537724069019 SHA-1: 4cb42ee051b480f5c3412ce3f8ac5c2284dd5df6 SHA-256: 007feb94671f38d66a75e9310a75cf5a977ed6ac1a1205cd77eb91ae35c0da3b
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, specifically 'https://trafffe.ru/123?utm_term=scott+the+painter+math+problem+answer'. This URL is likely part of a phishing or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/123?utm_term=scott+the+painter+math+problem+answer
    • https://cdn-cms.f-static.net/uploads/4372980/normal_5f90d96e0ece3.pdf
    • https://static.s123-cdn-static.com/uploads/4428329/normal_5fc4aade99fc7.pdf
    • https://static.s123-cdn-static.com/uploads/4455881/normal_5fe2a0e611d1e.pdf
    • https://cdn-cms.f-static.net/uploads/4369914/normal_5fd7a345c16af.pdf
    • https://cdn-cms.f-static.net/uploads/4383689/normal_5f948136a0e08.pdf
    • https://cdn-cms.f-static.net/uploads/4444850/normal_5fd112ad1fb6c.pdf
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5fda817a54e9b.pdf
    • https://cdn-cms.f-static.net/uploads/4389581/normal_5fb62a1191fd9.pdf
    • https://static.s123-cdn-static.com/uploads/4465000/normal_5fc63b3a3e5fc.pdf
    • https://cdn-cms.f-static.net/uploads/4487424/normal_5fba9000dfea5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6b3b61e7-cf3d-43d5-96d6-dcc9aae95dd3/daduj.pdf
    • https://uploads.strikinglycdn.com/files/02b5f925-2456-48da-9b5a-0b9ee5370153/kino_der_toten_guide.pdf
    • https://s3.amazonaws.com/kavitokolezub/reteb.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_off0000d263.bin
df185060c2ae14e99fd18bbb4d0c435c1ef9a98af8d4cce58c333cf2f2a3e590		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD263 5508 bytes
font_01_sfnt_off0000e4fc.bin
a82009b4c1f0f56d641589597f62f0d53a3d4345b1c5746a2b01a0e2b1abc2ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FC 11788 bytes

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