Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e50f477fd52d08b…

MALICIOUS

PDF

64.6 KB Created: 2020-12-06 11:14:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbccbd239dd433c46e3a885785b467b1 SHA-1: 518b5041e2073e402c2aaf63e759ea5824df6db2 SHA-256: 8e50f477fd52d08be19424ce7def6cd18efc0e5ebba043e3abea9058f331b8a7
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 URI pointing to 'trafftec.ru', which is likely part of the attack chain. The document body, though heavily obfuscated, contains references to 'game booster' and 'wkhtmltopdf', suggesting a lure to disguise malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=du+game+booster
    • https://cdn-cms.f-static.net/uploads/4458144/normal_5fb65e1fac62e.pdf
    • https://cdn-cms.f-static.net/uploads/4388629/normal_5fba3471cb3ca.pdf
    • https://cdn-cms.f-static.net/uploads/4389794/normal_5fb5322421611.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bisute/salikowulis.pdf
    • https://s3.amazonaws.com/gifiz/lijebixixilegol.pdf
    • https://s3.amazonaws.com/zasepo/75276988280.pdf
    • https://s3.amazonaws.com/sukobogixe/free_card_numbers_that_work_2020.pdf
    • https://uploads.strikinglycdn.com/files/ca2ca5b4-a69b-4462-929a-57556be596f4/xemopemipit.pdf
    • https://s3.amazonaws.com/waxegatulo/lunivufovedodinitifapopub.pdf
    • https://uploads.strikinglycdn.com/files/ee53d2e2-810b-438f-ad0b-ccfd24f7ae60/38710158904.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_off0000c0f9.bin
033bb61cab329dc0143c808b07699aeb468845a7d2810ebc3458ec3f07395054		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F9 5112 bytes
font_01_sfnt_off0000d24e.bin
3915a2814cafbd52770e6799db20cd0db96c0874d49924750929d5b4e4502309		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD24E 10512 bytes

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