Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc813b018268f6cb…

MALICIOUS

PDF

72.9 KB Created: 2021-06-06 16:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7d24321d62006d5f9d585c2fc6f00f40 SHA-1: 257021f99133f18636bf324769e14e8feaf433bf SHA-256: bc813b018268f6cb5ea8750dbe6b394bb1c8fc8067d3bac58f1577769935cd72
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the primary links points to a URL that appears to be related to '48 rules of power list pdf', potentially a lure for users seeking specific content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://medvor.ru/pbw?utm_term=48+rules+of+power+list+pdf PDF link annotation
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/6879872.pdfIn PDF document text
    • https://japiravonasuv.weebly.com/uploads/1/3/4/6/134644749/sasulinibugen-kadomavixikof-xutivajafefo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392218/normal_60ba64b8aaa54.pdfIn PDF document text
    • https://pupaxuge.weebly.com/uploads/1/3/4/0/134096873/8532806.pdfIn PDF document text
    • https://lezivefa.weebly.com/uploads/1/3/4/4/134458465/zopaf-lepexudafejas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445557/normal_5fc86d6907f19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379369/normal_60001d3bb3ec4.pdfIn PDF document text
    • https://xesukalo.weebly.com/uploads/1/3/5/3/135311970/3bf866a6a11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423148/normal_60008b05a91ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502870/normal_5fce4dcfb8c86.pdfIn PDF document text
    • https://pafajarofotixo.weebly.com/uploads/1/3/4/7/134773208/1df2aff523.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479932/normal_5fdd41803641a.pdfIn PDF document text
    • https://raxasowofano.weebly.com/uploads/1/3/2/6/132681821/vutered-xebugesuja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389821/normal_604e92acdf7e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493553/normal_606a790d6ef43.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://najapenoz.pbworks.com/w/file/fetch/144550746/neonatal_resuscitation_guidelines_2018_ppt.pdfIn PDF document text
    • http://ludagobef.pbworks.com/f/lg_tv_price_in_bd_2020.pdfIn PDF document text
    • http://wenuveraroto.pbworks.com/f/4_____1.pdfIn PDF document text
    • http://zokosixaged.pbworks.com/w/file/fetch/144722031/57034298146.pdfIn PDF document text
    • http://wixugigir.pbworks.com/f/18170918494.pdfIn PDF document text
    • http://fudejob.pbworks.com/w/file/fetch/144519630/mandarin_stunt_cars_2_unblocked_games_66.pdfIn PDF document text
    • http://namikikis.pbworks.com/f/jonoze.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_off0000dd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8F 5104 bytes
SHA-256: d323de1ddf51bea362377fc2934f854fcb8fe7a3e115387c53e21298cf5c4421
font_01_sfnt_off0000ef15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF15 11936 bytes
SHA-256: d5fb1ae4fe5edcb9dd290c22028a50f3543a53d57071ef46c8755a78c4d3d6e4