Malicious PDF — malware analysis report

Static analysis result for SHA-256 8651097f660d73fe…

MALICIOUS

PDF

68.2 KB Created: 2020-12-22 06:03:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 736f0b4e9c5cc0a8a42a172ab29fa35d SHA-1: 17dfa4320c0fec9674e2ffca3b8a7a680a9580aa SHA-256: 8651097f660d73feb1243de3ed6a0cc822bd3d599ff2b544f0a39f0a2e2f6fee
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafftec.ru', which is likely a malicious domain used for phishing or malware distribution. The document body, though heavily obfuscated, appears to contain references to game-related terms, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=ice+climbers+smash+ultimate
    • https://cdn-cms.f-static.net/uploads/4427821/normal_5fba24f731eba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/aee913b5-22d5-4c63-8ac6-dffe8837f959/gokuwitewazogibip.pdf
    • https://s3.amazonaws.com/jamuluvuvava/standard_enthalpy_of_formation_worksheet.pdf
    • https://s3.amazonaws.com/gupuso/binary_logic_reasoning.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcee4acc750a3b5a04b563/1606217292496/pufezag.pdf
    • https://uploads.strikinglycdn.com/files/329c96ce-dde9-4e89-861c-8ece89aa1169/7013370449.pdf
    • https://s3.amazonaws.com/piwupevivotixi/adobe_audition_cs6_portable.pdf
    • https://s3.amazonaws.com/musoxifuvitalo/tezin.pdf
    • https://uploads.strikinglycdn.com/files/0f971453-8801-42b3-a6e4-10f24efb591c/92623804621.pdf
    • https://uploads.strikinglycdn.com/files/76374ae8-c5e1-4ba1-acc4-80d2cf1b8072/31436920796.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_off0000cea4.bin
b811ec5db4c70ad9018132ebd16e734ecdd1df39e145e30b456bac4ee483bc03		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA4 5116 bytes
font_01_sfnt_off0000dfd7.bin
83114b186e24909583d2ade1ba0ef6dcc2e96c50282bea331dcd7b2f112017ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD7 10928 bytes

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