Malicious PDF — malware analysis report

Static analysis result for SHA-256 38bdfdfcfa8ba953…

MALICIOUS

PDF

107.5 KB Created: 2021-02-26 12:05:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 36ab202c441e4b4909f67db6a20f2619 SHA-1: 0f2be28c6e1bac485dbed94c57a7913fc64b740c SHA-256: 38bdfdfcfa8ba9538968db4de414cffe4c6f26d1c8620582e7cf162c9b544386
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 point to disposable hosting or link farms, indicating a likely phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

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://nipisod.ru/award?keyword=what%2527s+the+lowest+mortgage+rate+for+refinance PDF link annotation
    • https://cdn.sqhk.co/nafolekuge/ehfvKii/checkers_online_multiplayer_with_friends.pdfIn PDF document text
    • https://cdn.sqhk.co/nakijalufiw/BRjfgjH/parkour_spiral_maps.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/bjiidNN/70994801887.pdfIn PDF document text
    • https://temisufe.weebly.com/uploads/1/3/5/3/135384001/3612402.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412174/normal_6022a0982e84d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426066/normal_5fda686c88143.pdfIn PDF document text
    • http://wavujilipazi.22web.org/macro_organic_lasagne_sheets_ingredients.pdfIn PDF document text
    • https://fakebomazeb.weebly.com/uploads/1/3/1/4/131453402/kelabo_bafuzetituge_mupelitabuz_virisovibazujuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450878/normal_601dcb6cc47b2.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/Iifjcjf/kajobawitu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nozaleb.rf.gd/73961273861.pdfIn PDF document text
    • http://volajigatume.epizy.com/all_landforms_in_the_philippines.pdfIn PDF document text
    • http://vipojidetag.epizy.com/cdr_king_router_manual.pdfIn PDF document text
    • http://fofodas.rf.gd/46000281824.pdfIn PDF document text
    • http://kevarivujez.rf.gd/application_form_for_scholarship_2019.pdfIn PDF document text
    • http://rizukapusapanom.rf.gd/crack_sketchup_pro_2015_32_bits_espaol.pdfIn PDF document text
    • http://remivipe.rf.gd/application_ccleaner_android.pdfIn PDF document text
    • http://mivajale.rf.gd/dogagalanutazaxitagirezu.pdfIn PDF document text
    • http://fukogalijikufoz.epizy.com/83180596083.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_off000167fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167FC 5432 bytes
SHA-256: e419e2c062a1e0db7835cfe5f23ed413f6b7390e179251c1259ac4129b34fdd6
font_01_sfnt_off00017a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A73 11152 bytes
SHA-256: 78f38ba78cc9e6a64a76c25c720339ccf245f6350972f32085d7c810b6bac8f5

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