Malicious PDF — malware analysis report

Static analysis result for SHA-256 f823fcfe267422b5…

MALICIOUS

PDF

79.2 KB Created: 2021-03-15 14:41:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2796ee8559b03b8c257b8f5f7046bb4b SHA-1: 765f5fca0841459aa4aa55804cd49f47d9a11eeb SHA-256: f823fcfe267422b50fa6645d93ac79b87bf0be478f0d658db61f2134e4170411
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate this is a common tactic for SEO poisoning or phishing. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lead users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/award?keyword=college+application+timeline+pdf PDF link annotation
    • https://cdn.sqhk.co/tobamozusaj/4gjidbN/lock_screen_wallpaper_hd_joker.pdfIn PDF document text
    • https://cdn.sqhk.co/xudevekelefe/H5BiicT/66494726255.pdfIn PDF document text
    • https://rurawovupotoli.weebly.com/uploads/1/3/4/0/134017211/198d443.pdfIn PDF document text
    • https://vakikuxikedeti.weebly.com/uploads/1/3/5/3/135320305/vuzano_gojijokug.pdfIn PDF document text
    • https://cdn.sqhk.co/rojarimeg/ZMIiaje/ornl_fcu_mobile_app.pdfIn PDF document text
    • https://cdn.sqhk.co/zokosofu/hgjjjjW/democracy_women_s_plus_size_jeans.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385863/normal_6023ff2897c11.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/mensa_iq_test_answers.pdfIn PDF document text
    • http://libralab.digital/free_charity_event_program_templatefsqfm.pdfIn PDF document text
    • https://jovonawokemurif.weebly.com/uploads/1/3/4/6/134678447/telalorerekufoz.pdfIn PDF document text
    • http://uspeh.icu/hero_4_black_casedk3i7.pdfIn PDF document text
    • http://kigurumi.org/jeragitexuzjhwhf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404490/normal_604d7db0408b7.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/amazing_grace_instrumental_piano.pdfIn PDF document text
    • http://itawegan.space/bill_nye_rocks_and_minerals_worksheetdo1pz.pdfIn PDF document text
    • https://s3.amazonaws.com/rizoli/leica_m6_e_m7.pdfIn PDF document text
    • https://bubamixidik.weebly.com/uploads/1/3/4/6/134657394/28e76.pdfIn PDF document text
    • https://sudarotabodubig.weebly.com/uploads/1/3/1/4/131407445/4607504.pdfIn PDF document text
    • https://belujewirozem.weebly.com/uploads/1/3/2/6/132681559/balunigutatef.pdfIn PDF document text
    • http://comp-arenda.site/english_speaking_course_online_appswenr.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/bengali_movie_i_love_you_song.pdfIn PDF document text
    • https://xaxaguxoludu.weebly.com/uploads/1/3/4/5/134519627/1575307.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCF 5012 bytes
SHA-256: 64ccc817ca95f5f443294f26b3fd7bc2c337b1d7b752a728a29b239fc47d7cf1
font_01_sfnt_off0000fdcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCC 10344 bytes
SHA-256: cd3ea3ca276e720119d6d6c5c974e77a3d1f0c3bdf539323f4ae3640280024e9
font_02_sfnt_off00012149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12149 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176