Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5bea1879a3415cc…

MALICIOUS

PDF

69.2 KB Created: 2021-01-04 00:53:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 36a8b076b6a59dec87a4a8c14dc15a27 SHA-1: 2c64dc7c620d74c68d57f4c20f5350bbba767bb7 SHA-256: c5bea1879a3415cced05a01769b35de06af35edc9188cedfcbab58fcbadcaf9f
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 'trafffi.ru', which is likely part of a phishing campaign. The document body, though heavily obfuscated, contains text suggesting a challenge or game, intended to trick the user into visiting the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://trafffi.ru/123?utm_term=just+2+words+level+1015 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495694/normal_5fbcbd5c37b2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_5fae69aeaa02b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382423/normal_5fde79ab9f40d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495042/normal_5fb860d0252ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b22fae58-4f64-4f94-8aa1-ac81eedb9e77/house_of_vettii_ap_art_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aeaca23-a4e9-4d54-8ed2-c33642a241fa/lojatepanasafugimovimim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65fb1a37-449e-4db8-8ee7-dfe04571e916/dexavasus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b0d0867-6f9c-4f25-8c00-454f0b7f4591/kanelesupuluvaxafiriz.pdfIn PDF document text
    • https://s3.amazonaws.com/temuxow/noverarejijekuz.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D2 4928 bytes
SHA-256: 300d44cb932bf6c13dae533fae125e28663861cdbc4112a5c36561daf4bd208c
font_01_sfnt_off0000d6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D1 10388 bytes
SHA-256: a4db8305a9957eb46f3cdda962085c7f30367049ec09c38e5a0096e77d9f8bb9
font_02_sfnt_off0000fa81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA81 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176