Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6b24ca77a1c747…

MALICIOUS

PDF

63.8 KB Created: 2020-12-31 14:21:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a1084d47acaaa51dfb670221f7d03249 SHA-1: d86b80ea8281f21d221e10004f0c7c2fc1f21092 SHA-256: cc6b24ca77a1c74740f2d0150be2812c7e513f248e865a6076324e243fe4a116
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious content. The primary URL, 'https://traffset.ru/strik?utm_term=octopus+watch+v2+screen+protector', appears to be the lure for this attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/strik?utm_term=octopus+watch+v2+screen+protector PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421339/normal_5fd680d8c3a40.pdfIn PDF document text
    • https://sajofagexureleb.weebly.com/uploads/1/3/4/6/134652103/gomopujitubajep.pdfIn PDF document text
    • https://besekexedonake.weebly.com/uploads/1/3/2/7/132741764/wetekewebajutus-vivutikowal-lamabez.pdfIn PDF document text
    • https://xowunaxevome.weebly.com/uploads/1/3/4/6/134679103/09aa296e6da6.pdfIn PDF document text
    • https://bonopabugo.weebly.com/uploads/1/3/4/5/134581776/bf86e3.pdfIn PDF document text
    • https://detaxotipag.weebly.com/uploads/1/3/4/7/134730838/f05e01a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/10f0001f-0eda-47ca-9e00-82f5645c2cfe/tukoxivofezozekibane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/362771b6-9dd5-49db-a9fb-744a04d8e05c/17827915838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7ea46e6-1232-4522-9cf7-fda6145be93f/39541346122.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08c7a7b3-f166-4ef6-a37b-81fad419c0d8/western_global_airlines_jobs.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_off0000bc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC0D 5300 bytes
SHA-256: 12d9adf89e5ef96c26378bd20034c496b13fa1c1a62381a6e14ec7f13f831bdd
font_01_sfnt_off0000ce28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE28 10760 bytes
SHA-256: 6e09996568eeba3941b5ad1f23b051c90f1757c031177d4595df0613ded1282e