Malicious PDF — malware analysis report

Static analysis result for SHA-256 029e9e4708c0ed38…

MALICIOUS

PDF

72.8 KB Created: 2021-03-03 18:41:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 1e77c7bc83b006e4a1615f07c0d2f19e SHA-1: 8d448bd089110402b81b74ba5aa87aea67058085 SHA-256: 029e9e4708c0ed38b1cf0fe32c2ea1d8221f3105c23971bda2597fc4da46d749
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The document contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the PDF is designed to host many links on low-reputation sites. No scripts were extracted, but the overall structure and URL distribution strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=how+to+explain+lyrical+dance PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497687/normal_601728093307e.pdfIn PDF document text
    • http://phrensy.co/safety_data_sheet_template_docqxn7s.pdfIn PDF document text
    • https://cdn.sqhk.co/mawedabe/Mjfjajf/fibojedobemedak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470542/normal_5fc79bb41bd2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_601ed03de50fb.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/bosch_series_6_silence_plus_dishwasher_manual.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/derechos_humanos_en_ingles.pdfIn PDF document text
    • https://cdn.sqhk.co/joremeve/gqhi6jh/jufaferuzavuledofiw.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/suzipep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412887/normal_603b17c5136b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460473/normal_60267bb96dd0a.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/27892629860.pdfIn PDF document text
    • http://websporizlehd.com/burp_suite_1._7._27_crack0hw6r.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_off0000df61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF61 5112 bytes
SHA-256: 2450bbcc0a460855cb211ef54c61023e758f941b3321332f2899c350abdad60c
font_01_sfnt_off0000f0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EC 10568 bytes
SHA-256: 4918c56c562eeb8cacdf2450d4d6b2e1f26bc775e5d5cd1b9f2eeda04f3f8748

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