Malicious PDF — malware analysis report

Static analysis result for SHA-256 f64bf9d51c669943…

MALICIOUS

PDF

97.4 KB Created: 2021-04-01 17:23:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 718878a5a649b6f6f719eb7274721242 SHA-1: 9f9493d2614af5469ace1b7a17cf376515208bd0 SHA-256: f64bf9d51c669943fb04d4824d868ad64870fff73327342a421f29188cd077c6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://ponafet.ru/strik?utm_term=ubu+roi+pdf+espa%25C3%25B1ol PDF link annotation
    • https://cdn.sqhk.co/tuxonewebuke/jeiggeu/30004432668.pdfIn PDF document text
    • https://cdn.sqhk.co/vamunidibu/6tmBibt/10055735096.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/phfFgii/stuntman_mike_nachos_recipe.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/lihggW2/melizepurebav.pdfIn PDF document text
    • https://cdn.sqhk.co/busosuwik/UOVa2VM/men_s_world_cup_2026_cities.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lidizuderezoza.rf.gd/fetuziridavefame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/543088b4-84d4-4acf-9da1-f6c8b180b0c4/47682248409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66e23a22-2c65-425d-955c-e10b8f2c69ca/motorola_xts_5000r_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f4f899a-e148-4ee9-9fdc-fd307f7eea6b/kavelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dbe0059-60b5-45ae-8cb8-5bf80ecfca36/how_to_upload_photos_to_google_photos_from_android.pdfIn PDF document text
    • http://runapapaxezupow.rf.gd/galvanized_sheet_metal_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1398658c-952d-40f3-87ca-b15bdf30ee95/keto_recipes_for_uk.pdfIn PDF document text
    • http://puvuxepijoxum.rf.gd/zepobalubexanawokevode.pdfIn PDF document text
    • http://dekuroveki.rf.gd/81125965695.pdfIn PDF document text
    • http://pefanusomi.epizy.com/official_bitcoin_android_wallet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c030440e-e97c-4a61-b46b-24b5146652c1/dizemikib.pdfIn PDF document text
    • http://rajomijal.rf.gd/que_es_el_clearance_de_creatinina.pdfIn PDF document text
    • http://funadorexizuju.rf.gd/identifying_conflict_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ffa13c-1b31-47f6-8f7c-af7a343377a1/41548551837.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B86 5376 bytes
SHA-256: b906d02d8e2f9f7dbbe813b954fa844555dee6f6877afae2425ec2d16ab82191
font_01_sfnt_off00014d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D95 13880 bytes
SHA-256: 4a7c78cc7b813c3de19239e2ab7faa515651db2db05f980f0a6d06db3afd0933

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