Malicious PDF — malware analysis report

Static analysis result for SHA-256 42c4037379eca713…

MALICIOUS

PDF

71.1 KB Created: 2020-12-23 18:48:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2f8124730f293eaa0e4246fc816659dc SHA-1: 623211d3981caab4a9eea249399ae193ce0c6359 SHA-256: 42c4037379eca7131c9fc8b5938142a4c1eb6836fb5f40b439925c0dded56430
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to external websites. One prominent URL, 'https://trafffe.ru/strik?utm_term=the+wolf+of+snow+hollow+release+date', suggests a phishing or scam attempt by luring users with movie-related content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffe.ru/strik?utm_term=the+wolf+of+snow+hollow+release+date PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488141/normal_5fc95bd45f28f.pdfIn PDF document text
    • https://pawiwojofidinof.weebly.com/uploads/1/3/4/4/134458390/jamejo-julutisisufifef-jonuzilajos-zugugijepexosi.pdfIn PDF document text
    • https://cdn.sqhk.co/dadakafopina/ihjjUI2/33179061001.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/911455.pdfIn PDF document text
    • https://vugifalufaduzo.weebly.com/uploads/1/3/4/8/134889855/3952834.pdfIn PDF document text
    • https://pufoxufuzevelo.weebly.com/uploads/1/3/4/4/134486621/2c69a385.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414166/normal_5fa11e0724987.pdfIn PDF document text
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/futuzi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pukiza/molaridad_normalidad_peso_equivalente.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48e1526a-7e62-4de6-b314-bec3a7912955/wisipalovezarupejeduga.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/wozalurivebikovefuvoxawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59f5b348-8fbc-4266-a330-570f87a5fd2a/love_death_555.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/lemoguk.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/granny_smith_apk_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a0aa772-91ae-46fb-913a-f853e709eaa5/15432115681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33959f64-322a-4ef9-b9ca-5b7a4c7096b0/75420331228.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD875 5036 bytes
SHA-256: fac9bc9c20132dab63287c22eea8f38918d1dadb74f46542250f5cb014f73f0a
font_01_sfnt_off0000e99d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99D 11064 bytes
SHA-256: f78566a7f78769aaf541e0d3ca990749ea8138a089749b649854263b606b89f6

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