Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fab46b23f66715f…

MALICIOUS

PDF

75.3 KB Created: 2020-12-24 18:33:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c44c8c773ae49a51808048e27cf95707 SHA-1: 1ecdf534494a4682b5ecd929ea108525e171bdfc SHA-256: 7fab46b23f66715f1187b321939b71220a3198f354b531e23bdb5aebe1c80d2d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to potentially malicious domains, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure, likely attempting to direct users to a site for credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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=xcom+2+talion+construction
    • https://cdn.sqhk.co/sejujona/ibjd4ig/cake_chocolate_recipes_easy.pdf
    • https://cdn.sqhk.co/mepetiruzi/wNShdig/tokeziforakufobi.pdf
    • https://woxujinugav.weebly.com/uploads/1/3/4/3/134305359/limutikowuterifoxi.pdf
    • https://cdn.sqhk.co/balekunu/ia8snij/97446670152.pdf
    • https://cdn.sqhk.co/bebumula/2iePfia/rotten_teeth_in_dogs_pictures.pdf
    • https://tuvozejuwubox.weebly.com/uploads/1/3/4/3/134323710/jitajakitanipom.pdf
    • https://mazegiwekode.weebly.com/uploads/1/3/4/5/134529082/lorelo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/a71fdfcb-6b79-4e82-9cf6-925c6454e7ab/the_necklace_quiz_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/c38a6b48-023e-48c2-81e1-15e0b8234988/08_mitsubishi_lancer_es_specs.pdf
    • https://s3.amazonaws.com/xiwevitox/laws_of_motion_worksheet_8th_grade.pdf
    • https://s3.amazonaws.com/betefowubevat/14757871925.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de85.bin
da3e4cce627618d1c25e72bed8975eea97ce5154b626bb582a15094df736a07e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE85 4816 bytes
font_01_sfnt_off0000eeb3.bin
62ea36d796f22ecb6968d4fa0baa054fb4af005dbb66f7d5d801cff733814aae
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB3 10496 bytes
font_02_sfnt_off00011298.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11298 4324 bytes