Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf636522392cc7a7…

MALICIOUS

PDF

78.8 KB Created: 2021-03-03 15:49:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 8195c2f25c0c368a01d5aae6516d2404 SHA-1: 56e1ebc360f0f910f909bff7e70446bd330118c3 SHA-256: cf636522392cc7a7b6028f9bae6757e3734c8ca92056ab2f9f789ae1fdb3c07a
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML classifiers and ClamAV, as malicious. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/award?keyword=cessna+210+maintenance+cost PDF link annotation
    • https://worojuwoxalo.weebly.com/uploads/1/3/0/8/130814432/e29b26012.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/37118166020.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/does_the_watchmen_movie_follow_the_comics.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/why_does_emma_bovary_kill_herself.pdfIn PDF document text
    • http://hightrade.club/mozart_eine_kleine_nachtmusik_sheet_musicauvqh.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/xalutedar9m0f.pdfIn PDF document text
    • https://mipadabu.weebly.com/uploads/1/3/4/7/134751654/julawulezu-lojenagumuxonoz.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/resumen_del_capitulo_6_de_la_novela_el_color_de_mis_palabras.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/coleman_powermate_1850.pdfIn PDF document text
    • http://giocodigital.website/70035890041g5p8.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/what_is_long_term_basis_reported_to_irs.pdfIn PDF document text
    • https://giliruba.weebly.com/uploads/1/3/1/4/131483170/nojazufaxikodudoluv.pdfIn PDF document text
    • https://cdn.sqhk.co/xivomojuf/chbxjap/94511064449.pdfIn PDF document text
    • https://gojesewemuvi.weebly.com/uploads/1/3/2/6/132681304/6d3c9.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/iwBYkxp/puwamegotegekixujekomof.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/1UhfgVM/trial_xtreme_4_money_cheat.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/bowflex_pr1000_home_gym_accessories.pdfIn PDF document text
    • http://baykamif.space/discontinued_operations_segment_reportingm9fxz.pdfIn PDF document text
    • https://cdn.sqhk.co/xolanikipiz/bKhghg8/best_diy_owl_sleeping_eye_mask.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wejufutaz.onlinewebshop.net/83006977413.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/how_did_the_amnesty_act_of_1872_influence_reconstruction_brainly.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/fogovunakotavofikugegisi.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_off0000f80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80D 5048 bytes
SHA-256: 9c970a0f4747fc791aca88665fbe28d5a58e1603f99c373fadbbccf7dfa94cac
font_01_sfnt_off0001092d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092D 10660 bytes
SHA-256: 90494a1b8c3ff0a59a4b59f741dc755a892d2a906b0fc2931d460d5939d1b529

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