Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a36f4b5fad47c1c…

MALICIOUS

PDF

68.5 KB Created: 2020-11-29 12:43:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f69134fb8b08e0f4e56edc276026d802 SHA-1: 100d265a8cea4ef4427ae8229482b20d5288f20f SHA-256: 0a36f4b5fad47c1cd6c8e86a2ba380eb5b8eff5ab29c6fa74da3a5498e2808bb
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffking.ru/strik', which is likely a malicious redirection or phishing URL. The document body, though heavily obfuscated, suggests a lure related to a 'computer hardware pdf book'. No scripts were extracted, but the PDF structure itself likely facilitates the malicious redirection.

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/strik?utm_term=computer+hardware+pdf+book
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/32487625c0.pdf
    • https://cdn-cms.f-static.net/uploads/4379606/normal_5f920d0fe7963.pdf
    • https://cdn-cms.f-static.net/uploads/4450870/normal_5fa9230b3d972.pdf
    • https://cdn-cms.f-static.net/uploads/4386828/normal_5f9050f22f4e2.pdf
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5f9e3c7a5f7fb.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1515306.pdf
    • https://cdn-cms.f-static.net/uploads/4380083/normal_5fbedf289e4cd.pdf
    • https://cdn-cms.f-static.net/uploads/4405206/normal_5fad7d3fa3627.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9af0a807-b090-4575-a73a-6c44d43a4512/pokemon_fan_games_2019.pdf
    • https://s3.amazonaws.com/risalenefazozo/youtube_vanced_apk_download_reddit.pdf
    • https://s3.amazonaws.com/tuzamada/68434147149.pdf
    • https://s3.amazonaws.com/xebuvuwov/basijereriji.pdf
    • https://s3.amazonaws.com/pazifetanegapu/86512869048.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_off0000cc7d.bin
57354845f5b9a75d3ce1c65b7c8656bbacbb65bb27c17c80676c019da34ee7c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7D 5272 bytes
font_01_sfnt_off0000de4a.bin
8e0a1ce5310cdf5358be335b3e2821bae113fddd3349d7b5bb89397dacd7943e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4A 11472 bytes

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