Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be812284fee7ff1…

MALICIOUS

PDF

70.2 KB Created: 2020-12-19 00:49:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21142cfba257c83d2188e8f98a24e4dc SHA-1: 13dfa7d9590afa1053f77d2591de4c3935c6940d SHA-256: 5be812284fee7ff165c0ae33eb9fd450635b2db50325b5f38be15a4eb85f016a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to 'trafffi.ru', which is likely used for phishing or to download a secondary payload. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/strik?utm_term=cementacion+de+coronas
    • https://cdn-cms.f-static.net/uploads/4460946/normal_5fa34e2d331d7.pdf
    • https://static.s123-cdn-static.com/uploads/4486041/normal_5fc98d6c57480.pdf
    • https://dexixafavako.weebly.com/uploads/1/3/4/3/134348567/857001.pdf
    • https://static.s123-cdn-static.com/uploads/4454971/normal_5fcce2a16d3ac.pdf
    • https://zopodiwozexuma.weebly.com/uploads/1/3/4/7/134737972/zujin-welasez-dimim-zurenev.pdf
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/vimimijidife.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f8171442-4907-4c50-9243-38c76ab6a2ef/ziwasexepurikuboda.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd2006771f5d42aa2373bb/1606230023871/48973729874.pdf
    • https://uploads.strikinglycdn.com/files/880cb9b9-7e2a-41c2-ba75-56628186a322/45833712414.pdf
    • https://static1.squarespace.com/static/5fc2834392c50b1a1e81b518/t/5fc5d2bbeaf37e3b64661c2a/1606800060259/saxon_course_2.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_off0000d4be.bin
c6c6f6111df6bde7adf02f1ba586986bc3c23e53843a90d34787b275821a3465		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BE 4956 bytes
font_01_sfnt_off0000e577.bin
7da483bdcfbda84425de781402ce5d69208fac844c2d2e10e732e07895cd5608		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE577 11520 bytes

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