Malicious PDF — malware analysis report

Static analysis result for SHA-256 73aa97784c2ca880…

MALICIOUS

PDF

80.9 KB Created: 2021-02-28 09:24:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 5bfad77d567938fc42827880cc7780f5 SHA-1: 07c37431554ca4e5cd1c34aa4cb818edd5f16a07 SHA-256: 73aa97784c2ca88045a9e13a841fcaf95407fd1dffcf4e73cde5a04efe45e31d
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous external URIs pointing to disposable domains, suggesting a link farm designed to obscure the ultimate destination. The presence of urgency language further supports a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://golowaki.ru/award?keyword=do+daphnia+lay+eggs PDF link annotation
    • http://kifenefazujiz.iblogger.org/mathematica_5._2_software_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365547/normal_5fff43aa4c2fa.pdfIn PDF document text
    • http://scotiaenlineape-personas.com/diffusion_of_innovations_5th_edition_doiuffzj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424682/normal_5fc9445bb8c2f.pdfIn PDF document text
    • https://cdn.sqhk.co/regomesu/i7icYk4/fizozipiwexusenidopilu.pdfIn PDF document text
    • http://sport-stavki.fun/659826006453za6y.pdfIn PDF document text
    • http://tarubexuwixam.iblogger.org/78658970225.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/bSmicJK/1010_colorado_st._austin_texas_usa.pdfIn PDF document text
    • http://thefortykuti.com/bejipedorifopxvr14.pdfIn PDF document text
    • http://meetraisins.club/5061828778w3bgs.pdfIn PDF document text
    • http://servisvds.ru/35169882074yiya3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376602/normal_5fcb6bbda1d3b.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/icGhbhc/never_have_i_ever_cast_paxton_instagram.pdfIn PDF document text
    • http://sowoxapexemex.sportsontheweb.net/super_mario_land_2_for_gameboy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fudinurozoxesa.rf.gd/2018_amc_10a_solutions.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/how_to_make_a_claim_on_usps_insurance.pdfIn PDF document text
    • http://kepofif.onlinewebshop.net/life_goes_on_quotes_images.pdfIn PDF document text
    • http://pejonoma.epizy.com/roxetibevasagun.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/causes_of_water_pollution_in_ethiopia.pdfIn PDF document text
    • http://xekabotiwuker.atwebpages.com/torafalov.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/pulsar_150_photos_hd_2018.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_off00010185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10185 5228 bytes
SHA-256: 82beb1e2fca6a1ee6f6172cf95e8a6e3e0c8834c9537bafb739b9ec38070c7c8
font_01_sfnt_off0001135c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135C 10264 bytes
SHA-256: 31582b327db1ebba9294b1215a42191ceca49e2d03cc791b0de80872561cf47e

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