Malicious PDF — malware analysis report

Static analysis result for SHA-256 425c74b396b75333…

MALICIOUS

PDF

99.2 KB Created: 2021-03-01 06:42:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 1669009ad2fdc509ab345f21768351a0 SHA-1: 68330339a500114a47be4a344f1387d010868b75 SHA-256: 425c74b396b75333daca0dff1dbe7761c5a741f5ab63984453a2b928b4e8f7d4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, suggesting a phishing or scam operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful websites.

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://gimoguvi.ru/strik?utm_term=how+to+calculate+the+theoretical+concentration PDF link annotation
    • https://vufoduvetuf.weebly.com/uploads/1/3/5/3/135302170/e745735325c08.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/ZjiVWsh/fowevuguretuwus.pdfIn PDF document text
    • https://cdn.sqhk.co/lajojeletab/icqcBj2/nuvevewamexikudo.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/46677793377.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/35379923275.pdfIn PDF document text
    • https://xitozenajoxoge.weebly.com/uploads/1/3/2/6/132681812/nuniwilivetenivo.pdfIn PDF document text
    • https://cdn.sqhk.co/dafisuwikib/ahf5EAa/home_ice_cream_delivery_truck.pdfIn PDF document text
    • http://dodajavux.scienceontheweb.net/jvc_kd-r960bts_pairing_full.pdfIn PDF document text
    • http://wumiwuzigimo.mywebcommunity.org/what_size_sewing_machine_needle_should_i_use_for_cotton.pdfIn PDF document text
    • https://bafokaxaxex.weebly.com/uploads/1/3/4/8/134881351/7628163.pdfIn PDF document text
    • https://cdn.sqhk.co/papusabefo/BkIhazr/play_free_bubble_shooter.pdfIn PDF document text
    • https://jojobejuw.weebly.com/uploads/1/3/2/8/132815094/nomuwumidumodef.pdfIn PDF document text
    • https://gogovujogizog.weebly.com/uploads/1/3/1/6/131607278/depomak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/order_of_operations_worksheets_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/66928836910.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/krups_12_cup_coffee_maker_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/46753398519.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/weight_loss_exercises_at_home_video.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_off000142c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142C9 4764 bytes
SHA-256: 7b96f5bd27909b131ac6724dbdd6d9f25927e8dec511f670baa347a17597b09b
font_01_sfnt_off000152ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152FF 13172 bytes
SHA-256: 7dcc4590ec6ac26a093088b7ed2a739221e5906e73a290da320f9efe529e60bc

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