Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b3cdef9985551ac…

MALICIOUS

PDF

73.9 KB Created: 2021-03-24 05:34:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1a017e6ada2417570966895b5af1c4d9 SHA-1: c55988291a3099dd85d31e196f90eb46d9a80118 SHA-256: 5b3cdef9985551ac4e4985383405cc7eb69780aeb4fef7b434abe0028c7307db
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many of which point to disposable domains and are likely used to host malicious content or redirect users to phishing sites. The document body, though heavily obfuscated, appears to contain keywords related to trade information, suggesting a lure for users interested in financial or business matters.

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://xezojetit.ru/123?utm_term=derogatory+trade+information+on+credit+bureau PDF link annotation
    • http://tulavesew.getenjoyment.net/who_do_i_call_to_fix_my_dishwasher.pdfIn PDF document text
    • http://ligugiban.scienceontheweb.net/niligerusavuliru.pdfIn PDF document text
    • http://fezatubiwe.getenjoyment.net/11794752576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420013/normal_60570b9f2513e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424985/normal_5ff5a1a53ae91.pdfIn PDF document text
    • http://jizerigozigalav.getenjoyment.net/88157498538.pdfIn PDF document text
    • https://cdn.sqhk.co/kanedufopuma/Htbzjbg/easy_pound_cake_recipe_with_cake_flour.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/farm_biosecurity.pdfIn PDF document text
    • http://joriwolujuf.sportsontheweb.net/94263221995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387241/normal_605400d71bd65.pdfIn PDF document text
    • http://jotafitosixa.getenjoyment.net/borderlands_2_guide_officiel.pdfIn PDF document text
    • https://cdn.sqhk.co/nexasolonit/QgdcSpK/world_conqueror_4_world_war_1_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447884/normal_5fcdcef654833.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/mafavuzenoliki/59191736483.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c7b7162-e47c-44d0-a1bc-1de1dbf121c6/wolemukuvumizip.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/amelie_movie_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec8b52d6-56bc-49fb-99ee-f6e6369740f0/xoturuvolebako.pdfIn PDF document text
    • http://womawujun.atwebpages.com/mamoduzofijevasuxerug.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/is_pit_boss_owned_by_traeger.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_off0000e379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE379 5372 bytes
SHA-256: 8f50f5b797d12ee6790c61f407463c60a75d85cff21822306f95bd6e33fc0fa9
font_01_sfnt_off0000f5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BC 10700 bytes
SHA-256: 41dae451fbda9ccf451ab80c8ae9b2d34e8ad40d76d5b9d06a486d1a1e33dfde

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