Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df02c2ca372f538…

MALICIOUS

PDF

72.2 KB Created: 2021-04-08 08:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bfd8ee0f2f92bafa821ebf046987c6fa SHA-1: ddab9d54cae642dbfc86b5e1d4e208287d5353cb SHA-256: 3df02c2ca372f5388139811c1d195f3056c25b54f5cf4fdbfaeb807e7f13889d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a domain associated with phishing and malware distribution. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of using disposable hosting for link farms, further supporting a malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content, likely designed to redirect users to harmful sites.

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=acura+mdx+2015+service+manual PDF link annotation
    • http://toluvubub.mygamesonline.org/8912467896.pdfIn PDF document text
    • http://fibiver.mygamesonline.org/mepajamux.pdfIn PDF document text
    • https://cdn.sqhk.co/tobepeliv/XG6ibqi/fapozaroreseno.pdfIn PDF document text
    • http://dugarudewemudo.sportsontheweb.net/vetukudog.pdfIn PDF document text
    • https://cdn.sqhk.co/ditutafewaw/bgh6Ujh/zolelokidixuluxorigirefe.pdfIn PDF document text
    • https://cdn.sqhk.co/fematixub/jfThgjr/kitelawamibuditilulibelep.pdfIn PDF document text
    • http://discovljzg.fun/vufututolugisovikinepumwv9.pdfIn PDF document text
    • http://regvoolkim.website/gezironuriwagubugixanavel5qvy.pdfIn PDF document text
    • http://stnold.com/dumuwofow5raiq.pdfIn PDF document text
    • http://luchdobro.site/britax_car_seat_infant_manual7qx3s.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/aiaifgi/99213125929.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://majojevonomofu.rf.gd/65468411379.pdfIn PDF document text
    • https://f4e740b0-69d0-4d5c-a0c7-362dc6b2ad6d.filesusr.com/ugd/0356fc_dde5ffedb7e148bf9d201f8cf86176c8.pdf?index=trueIn PDF document text
    • https://56a79910-2d97-40e4-a1df-bca3b17021d7.filesusr.com/ugd/2721fc_d67b90aee5524014bbe2b139fabce100.pdf?index=trueIn PDF document text
    • http://ritivujivanupu.epizy.com/barcelona_tourist_map_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2878198-ab73-45f5-bac0-bfdef3cff363/unabomber_manifesto_espaol_descargar.pdfIn PDF document text
    • http://potopaf.epizy.com/21369785341.pdfIn PDF document text
    • https://5f98d79b-b704-4ecc-a618-200e52db7f79.filesusr.com/ugd/d1a5b7_2a721d7745fe44e2a5d99dbf7e675848.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ad66e88-38af-40f9-b434-dce113fdb749/tizogitorugamekerop.pdfIn PDF document text
    • http://fosoxubap.epizy.com/82549985272.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_off0000db3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3B 5652 bytes
SHA-256: e5b22904a26cf7d52242ba260f0cee385ed251602c8aa961825504f157950d79
font_01_sfnt_off0000ee6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6C 11000 bytes
SHA-256: 95677639b904245127db3c2eaf3ac73034fe38b2a376497d72d3ad53e768b322

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