Malicious PDF — malware analysis report

Static analysis result for SHA-256 35404af771922d6c…

MALICIOUS

PDF

78.5 KB Created: 2021-04-08 06:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1b8bf3073c67670a63c4cbf4320c01f9 SHA-1: d316c93288e355f774a49c08951e56b0cc2cb38b SHA-256: 35404af771922d6cd05f2c434a7d3bded65e188c479de37f5df01846b08e0401
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The ML classifier strongly indicates this PDF is malicious. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to contain keywords related to training materials, likely a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://xezojetit.ru/wix?keyword=peter+caine+dog+training+teespring PDF link annotation
    • https://cdn.sqhk.co/lomotutuwe/dPOffij/screen_recorder_screen_video_recorder_for_windows_10.pdfIn PDF document text
    • http://skameyki.club/hampton_bay_ac-552_light_kitujoov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476147/normal_601eaa15e21d8.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/whirlpool_cabrio_washer_and_dryer_red607gs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481671/normal_601838f655c67.pdfIn PDF document text
    • http://helper-badges.com/bagenubajibujojevk3aug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501042/normal_5ff41331a7e42.pdfIn PDF document text
    • https://cdn.sqhk.co/goxejake/jcYuDgd/my_scene_movies_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/dutimapo/hc1vjg5/best_caption_for_fb_profile_pictures.pdfIn PDF document text
    • http://insurancecarusa.com/golugikokokudabfban.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476434/normal_60606b25c947e.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/jdMyif6/94692850481.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/bgfjfgj/bufifukefuxiduk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://niragagazako.rf.gd/82833787396.pdfIn PDF document text
    • https://04a80c79-134c-446e-801b-0c1635678e59.filesusr.com/ugd/5cebf8_b7829ff638b140cd849b1d997c220387.pdf?index=trueIn PDF document text
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_2038318f88634d3b908628c24b254b16.pdf?index=trueIn PDF document text
    • https://f8d82b49-d438-4da2-b906-f876cb6fe635.filesusr.com/ugd/12dc78_b5cb6a1c4d554f37afbea945e18222a2.pdf?index=trueIn PDF document text
    • http://jijetebum.epizy.com/free_editable_binder_cover_templates.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_off0000f602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF602 5208 bytes
SHA-256: ea6acafbb606776bc0a9fd0056553a215ecabcaf2e1e94b5d2001f17a0558409
font_01_sfnt_off000107cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CF 10764 bytes
SHA-256: b4a1da27cab6cccc812093c5ec22b4a3ce273b1464bde614c944c52bcec34e19

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