Malicious PDF — malware analysis report

Static analysis result for SHA-256 71ad1f71faab05f9…

MALICIOUS

PDF

64.8 KB Created: 2020-11-10 04:40:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8cf5549a7bd8e7d580ec49b8a0164ea SHA-1: 72336ec4cedae00c610b054ca8eefe600392c47f SHA-256: 71ad1f71faab05f9907caa1bb3a3942641fcea6a9ce87da9c2e86c1fca5a3b4f
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL pointing to 'traffking.ru', which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to 'parts diagram'. No scripts were extracted, but the presence of an external URI and the overall detection profile strongly indicate a phishing or malware distribution attempt.

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://traffking.ru/123?keyword=pp4218avx+parts+diagram
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f91103a7d15a.pdf
    • https://cdn-cms.f-static.net/uploads/4380229/normal_5f9fa01612c03.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kavitokolezub/pakukokod.pdf
    • https://s3.amazonaws.com/wuniku/digizawuzotunafagotibi.pdf
    • https://s3.amazonaws.com/dorobukasawituw/fivuluvim.pdf
    • https://uploads.strikinglycdn.com/files/4aa08bdb-00db-4ca7-bdde-70940f14d4c3/white_superlock_534_instruction_manual.pdf
    • https://uploads.strikinglycdn.com/files/59f61b7b-ede9-4ba2-a925-a2a6aeee0458/67866637937.pdf
    • https://uploads.strikinglycdn.com/files/37095ae1-d627-46be-bf2a-51da2beeaf22/jabemivagofe.pdf
    • https://s3.amazonaws.com/fasanag/bangla_comic_golpo_free_download.pdf
    • https://s3.amazonaws.com/begijufadi/how_to_do_t_test_in_excel_mac.pdf
    • https://s3.amazonaws.com/lokijuronig/consumer_direct_virginia_phone_number.pdf
    • https://s3.amazonaws.com/kavitokolezub/mubodefabomunuvegigo.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_off0000c298.bin
52748c25ceab6b3574c34fc6e5b5a6380b2b679725c54b1cee1e6e83bffcfc86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC298 5840 bytes
font_01_sfnt_off0000d67f.bin
16dd36503cf35d2f4a31e72cf163097141674820d869b82ea0b108b6c90d3e93		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD67F 9392 bytes

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