Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af51201029b2c9d…

MALICIOUS

PDF

74.2 KB Created: 2021-02-13 08:39:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 57b527ab8c28c05c5ec1f578286481ed SHA-1: f1c67a4636b2efea81fc32d93959a9326d001894 SHA-256: 7af51201029b2c9df48073faca6c3fbdf542ff0f20db21b6c462dfa4d1d52a43
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing and malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, likely to obscure the true malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites, potentially for downloading further payloads or phishing for credentials.

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 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://baarspo.ru/wix?keyword=gta+vc+apk+obb+android-1 PDF link annotation
    • http://technodom11.com/cosmic_girl_bass_tabcyjzf.pdfIn PDF document text
    • https://tipowunukal.weebly.com/uploads/1/3/4/3/134355136/givila.pdfIn PDF document text
    • http://mir23.xyz/wifimapozeskqpt9.pdfIn PDF document text
    • https://pozefixinez.weebly.com/uploads/1/3/1/4/131454190/7609623.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475863/normal_5fffc46e9cb3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383687/normal_6009a65906899.pdfIn PDF document text
    • http://myluckywin.site/government_procurement_policy_board_manuallvxa4.pdfIn PDF document text
    • https://mabodezi.weebly.com/uploads/1/3/4/5/134590290/posubawamuvirep-bavaberes-mozasowozaziw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411932/normal_6018412e15a95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_600fffc51556f.pdfIn PDF document text
    • https://tewabigonin.weebly.com/uploads/1/3/4/7/134760563/bebifafozes-rikomuledareji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417656/normal_6026a7de369d5.pdfIn PDF document text
    • http://reduslimitalia-official.site/ximalitojudiwubojipiggpdoi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426972/normal_60252ea09f2b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451227/normal_5ff0220e67d50.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/xuxifuzituwu/cayuga_lake_fishing_guides.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/frilled_dragon_care_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/matrix_determinant_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/69895990390.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_off0000e736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 5236 bytes
SHA-256: fa9969ca4eafe2a33341dd111a3ded1ed8899f9b7bdd4c740e383cf98564f3aa
font_01_sfnt_off0000f927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF927 10080 bytes
SHA-256: 1ce508208b00f719cc88ea2bb251114f2ef757d4d797b44f3d7dea0c3ffcfb2b

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