Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f0425ab7348b80a…

MALICIOUS

PDF

137.0 KB Created: 2021-04-05 03:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: a4d3b1df98ab997a6fe82aab65689fb2 SHA-1: 19f7f6658eba645a4c239959d524511f58a716a0 SHA-256: 4f0425ab7348b80ae5218e000a39c534ad42bfcd7145baa6e53e2033d6a2a724
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to a 'Pavement distress rating lab report'. No scripts were extracted, but the presence of numerous external links is a primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://vilenefex.ru/123?utm_term=pavement+distress+rating+lab+report PDF link annotation
    • https://cdn.sqhk.co/wowebajix/iiodY4i/demon_ps2_emulator_pro_cracked_apk.pdfIn PDF document text
    • http://japarof.mywebcommunity.org/14857650304.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/xifosukej.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/heEhhif/oscar_de_la_hoya_vs_mayweather_stats.pdfIn PDF document text
    • http://tuvurebomiworo.scienceontheweb.net/dimifadejowew.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://zokitidekav.epizy.com/mumoben.pdfIn PDF document text
    • https://a49aa754-465e-4bbd-924e-b3d0e7b66bd4.filesusr.com/ugd/81d6a4_63d90950dcdb432b86065f3534715fa5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c3a92aa-1314-4c3d-9936-19a486eced0c/cyberpunk_2077_gameplay_leak_ps4.pdfIn PDF document text
    • http://zenakezogutomu.onlinewebshop.net/gesalezotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c7e7a52-e9bc-421b-8e48-d44b814768a5/jokes_to_put_in_a_class_president_speech.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2793d5d-bb20-43e8-b9d2-f075bc3a4065/how_to_make_a_daisy_flower_crochet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c32880ad-0f9d-4084-a5bd-5da0dfb7a34d/vedas.pdfIn PDF document text
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_ab170214c11d49f683230f686a642cd6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/13273a4e-917c-412d-a556-0f5016447144/zawak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a94c4a7b-bf6c-446b-8515-1611ea05e9c5/whats_the_difference_between_gen_4_and_gen_5_fossil_watch.pdfIn PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_21653aa93d124606bf5a7c7502a11c31.pdf?index=trueIn PDF document text
    • http://fezimebuwoki.rf.gd/pokitonurozawateb.pdfIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_e866a59526704bd0985ed4422a32b6a1.pdf?index=trueIn PDF document text
    • http://vibiputis.epizy.com/yoga_asanas_postures_with_names.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0afec2d8-233e-4c2d-9a0e-dd523a089568/26055725323.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B76B 5268 bytes
SHA-256: a051224e95baaef2bc7bbe055224fb1f335fa57a55f57898029590edefd2bab8
font_01_sfnt_off0001c92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C92C 12300 bytes
SHA-256: 08e4b9e37ac5b8098692fe74c449f1dbe57623b0e0f7afe6e02ba47c8a91944d
font_02_sfnt_off0001f330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F330 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330
font_03_sfnt_off000207c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x207C8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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