Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed71d4b799915ea9…

MALICIOUS

PDF

78.7 KB Created: 2021-02-26 06:34:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 8efea8a63c65d0fd21afcd4033b0cd85 SHA-1: 6e5e7eb67384c57dea91e14c03a0b18fa41271d6 SHA-256: ed71d4b799915ea91ab07bfbd0abdf1c7bd1fa9b708ac02ff11de28f707d13a6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, and the presence of external URIs points to the document's function as a lure to external malicious content.

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://maypoin.ru/123?utm_term=how+do+you+find+the+volume+of+cuboids PDF link annotation
    • http://fruit-italy.space/alternative_energy_sources_ielts_reading_answer4xz27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377380/normal_5fe8978b22fb4.pdfIn PDF document text
    • http://winoraama.website/adventures_of_huckleberry_finn_oxford_bookwormsl8ltw.pdfIn PDF document text
    • http://vpntop.info/fumox9lfus.pdfIn PDF document text
    • https://cdn.sqhk.co/zujubiviv/2h2ghXi/emergency_animal_hospitals_near_me_open_now.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365608/normal_5fde44108829c.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/MhejZic/wunifoniri.pdfIn PDF document text
    • https://cdn.sqhk.co/nananava/5ujbigc/75448336591.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463560/normal_5fe4d9f563c6c.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/gdihie5/vilux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481999/normal_5fe1969805791.pdfIn PDF document text
    • http://1green.space/1417841578222h31.pdfIn PDF document text
    • http://mandarin-fruit.space/the_soulmate_secretba0dr.pdfIn PDF document text
    • https://cdn.sqhk.co/mogudekusab/cJhT2jj/g_switch_3_mod_apk.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/timeziso/bowidusatidelivulo.pdfIn PDF document text
    • http://girofili.myartsonline.com/igloo_countertop_ice_maker_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/bawowasepuxojefasu.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_off0000f739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF739 5308 bytes
SHA-256: fbbdadeff702a4338fb82a78cfee93ccc42f716d752f607923e21bd5d8caadfb
font_01_sfnt_off00010946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10946 10648 bytes
SHA-256: 8a0e499620bee5425f6a3147a1828a2fe0f626d206d5adb25e1c4b90f3c59e39

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