Malicious PDF — malware analysis report

Static analysis result for SHA-256 4568d68800e72b1f…

MALICIOUS

PDF

65.9 KB Created: 2020-12-18 22:54:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65406bda5e77caf2fe8b5206e732e365 SHA-1: 1f30bbf81c060cbd4b95fc008377ef32fd2f146f SHA-256: 4568d68800e72b1f2e3807cd824b8f09ad220bd40bd168b74744c392b7973c54
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'trafffe.ru', which is highly suspicious and likely serves as a phishing or malware distribution endpoint. The document body, though heavily obfuscated, contains text that may be a lure, and the authoring application suggests it was generated programmatically, common for malicious PDFs.

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://trafffe.ru/strik?utm_term=another+synonym+for+protocol
    • https://cdn-cms.f-static.net/uploads/4492586/normal_5faed49318fc3.pdf
    • https://cdn-cms.f-static.net/uploads/4389365/normal_5f920cb9277d6.pdf
    • https://cdn-cms.f-static.net/uploads/4425483/normal_5f9b908bc81ab.pdf
    • https://cdn-cms.f-static.net/uploads/4377114/normal_5fa4ae46523f4.pdf
    • https://cdn-cms.f-static.net/uploads/4464539/normal_5fa6cde85ae38.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/babuxufarizuxur/71966258609.pdf
    • https://uploads.strikinglycdn.com/files/3272e406-87b5-4213-86eb-f71d0a7d8935/mutuwipezug.pdf
    • https://uploads.strikinglycdn.com/files/ced93e40-8d1e-4b5f-bde6-c77da6456ff7/vibikirumowegowedemifuti.pdf
    • https://s3.amazonaws.com/dutimajizowa/40872044262.pdf
    • https://s3.amazonaws.com/waxapoz/blackberry_playbook_os.pdf
    • https://uploads.strikinglycdn.com/files/6477c517-f46c-470d-b02f-ed70cd4a29f0/zefupinexeregusixo.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_off0000c46c.bin
19916f73fadebc7f1799c4cba22b09426ff0edc09b1f209c4401eb77d2559017		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC46C 5136 bytes
font_01_sfnt_off0000d5ca.bin
b3aa19cd9773d619d98cb3367b9c2887ca357623e7a04e823d4390d3346dfd1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CA 11032 bytes

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