Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd284f169a8c578…

MALICIOUS

PDF

72.1 KB Created: 2021-06-10 02:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 561d3d1f8204601dd22b93e0aa604c46 SHA-1: 3ec8e5082888ae4e5c1e87a29b948949d0d71b67 SHA-256: 1bd284f169a8c578005131bb78b8c172b3a0d0e32fecf54abfa65d5577c9b703
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, suggesting a link farm designed to obfuscate malicious destinations. The primary URL, 'https://pixomot.ru/pbw?utm_term=michael+buble+santa+claus+is+comin+to+town+lyrics', is likely a phishing lure or a redirector to a malware download site. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/pbw?utm_term=michael+buble+santa+claus+is+comin+to+town+lyrics PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381730/normal_5fc7cdf005df1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368223/normal_6034d1476c3fd.pdfIn PDF document text
    • https://lufojujerap.weebly.com/uploads/1/3/4/4/134481619/4669873.pdfIn PDF document text
    • https://xuniwinasifobip.weebly.com/uploads/1/3/5/3/135302293/113a6bc7b7d9e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503035/normal_6049bb9563140.pdfIn PDF document text
    • https://paruralevefux.weebly.com/uploads/1/3/0/7/130775474/62d58d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426280/normal_602e432b936e9.pdfIn PDF document text
    • https://xexunejakex.weebly.com/uploads/1/3/4/2/134266262/nawovuves_rurexugazuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451544/normal_600cc214f14cd.pdfIn PDF document text
    • https://patelevenimo.weebly.com/uploads/1/3/1/4/131437444/depitezuberure-zujab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_600f4b0aadba1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413228/normal_60690d6b45686.pdfIn PDF document text
    • https://dugitesabisaxo.weebly.com/uploads/1/3/4/3/134392589/miwuditijog-tafivo-jujivatuwapa-jugerof.pdfIn PDF document text
    • https://wotigutaz.weebly.com/uploads/1/3/4/3/134361511/gukiwe-pipupixikupixe-nimurevusef-lenuxeles.pdfIn PDF document text
    • https://faxasuxudoxo.weebly.com/uploads/1/3/2/6/132695360/3743850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484834/normal_6062790db6284.pdfIn PDF document text
    • https://juwomazitebuden.weebly.com/uploads/1/3/1/4/131414743/6393631.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95B 5380 bytes
SHA-256: 8aeaaed1dd25642d3b53901ed1134a0d4bf336aed003b2e97ac3f70513714efa
font_01_sfnt_off0000eb98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB98 13052 bytes
SHA-256: 03e3acd8f935524a092f8e9af655a8f28ca30a3df329a44ba55958db4bfddd1e