Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0fb7da5cb264bac…

MALICIOUS

PDF

118.2 KB Created: 2021-02-20 21:31:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: d53e2767b568050c8d2c1d8aa887f0bf SHA-1: 4493c3f9573159d4aa1cb36573814c827fd198e5 SHA-256: f0fb7da5cb264bac6a3e154d8462d1a51aa0168276d9ebdeb929ba73dbdcfaeb
194 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable hosting domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. The presence of urgency language in the document body, though low-signal on its own, supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jottigo.ru/strik?utm_term=what+time+era+was+pride+and+prejudice+set+in PDF link annotation
    • https://wozijasobinela.weebly.com/uploads/1/3/4/4/134445001/mokimem-bekakepu-xegovofujurede-fomudun.pdfIn PDF document text
    • https://cdn.sqhk.co/gisepavuv/VyhgWk3/tewimejedigiguzamepu.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/jbhegcY/99146333381.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/jh1AFXB/2_digestive_biscuits_calories.pdfIn PDF document text
    • https://cdn.sqhk.co/fitamorigob/jejbgdT/samsung_notes_update_unknown_sources.pdfIn PDF document text
    • https://mavabebuvaxar.weebly.com/uploads/1/3/0/8/130814237/gimesam.pdfIn PDF document text
    • https://cdn.sqhk.co/sisalubitot/SoFQQha/tefivosesurap.pdfIn PDF document text
    • https://cdn.sqhk.co/nowagenika/abAhjjf/radiation_island_free.pdfIn PDF document text
    • https://vumetubav.weebly.com/uploads/1/3/0/7/130776444/1706942.pdfIn PDF document text
    • https://vosikobogoj.weebly.com/uploads/1/3/4/2/134235386/balilenetusoda_bemoko_wuxepisejetat.pdfIn PDF document text
    • http://nofomox.22web.org/implant_surgical_guide_code.pdfIn PDF document text
    • https://cdn.sqhk.co/bovavadas/ijbihXY/ice_cream_cake_baker_shop_in_pune.pdfIn PDF document text
    • https://mabunamu.weebly.com/uploads/1/3/4/9/134902385/7a9f155.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/nitirew/rakidazusupolivuvo.pdfIn PDF document text
    • http://bonanelokuweje.rf.gd/98410175146.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/47377328646.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_off0001916c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1916C 5464 bytes
SHA-256: 5e7fce877289fe77071a3ffe438f89d13b227e43df9e81865f208dc958c18ecf
font_01_sfnt_off0001a3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A3EF 12124 bytes
SHA-256: aabf365941cfa3a41114b1e2b0f72682644de3811e5644c350dba3a7ce6e3994

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