Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e8eff71bfde233…

MALICIOUS

PDF

96.8 KB Created: 2021-05-03 08:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6f946c02c9abd11634a9e7faade8e089 SHA-1: a41884685c0e63f1b8127d86ca538751adfb2bb0 SHA-256: 59e8eff71bfde2334a5d7c5aafc320dabe102fa8da5a9973ec4734e139d3fecf
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant number pointing to disposable domains and acting as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to obscure the final destination, likely a phishing or malware distribution site. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://fokemale.ru/strik?utm_term=xbox+fennec+price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372723/normal_6016c024e103d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500447/normal_5fca41b52c47f.pdfIn PDF document text
    • http://nowojikowelox.iblogger.org/mefobobakotoz.pdfIn PDF document text
    • http://profapp.pro/gatisurokonizapewufo641gh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489994/normal_6032f5d8285b8.pdfIn PDF document text
    • http://copyright-help-report.com/2112530122026cxx.pdfIn PDF document text
    • https://cdn.sqhk.co/tojofelekob/ZxiawqG/rinedefikara.pdfIn PDF document text
    • https://cdn.sqhk.co/bumajanivosi/ftibWXz/dialga_weakness_pokemon.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/hhikgib/30143736999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487187/normal_60540cab37e21.pdfIn PDF document text
    • http://vashobereg.com/fedex_customer_support_email_address0q91x.pdfIn PDF document text
    • http://reliables.ru/lerenuxisikefipujigeduly9ahq.pdfIn PDF document text
    • http://oneitstore.pro/coleman_powermate_2200_pressure_washer_parts6hpmd.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
    • https://uploads.strikinglycdn.com/files/544fe076-a473-4fe3-937d-2f423dc2d3f8/how_long_does_light_therapy_take_for_jaundice.pdfIn PDF document text
    • https://63c031ef-a76e-4574-b6c7-b683c5cdde0f.filesusr.com/ugd/3a5e7a_5ab83a8e07354ec9a571b478f203b6f0.pdf?index=trueIn PDF document text
    • http://pevunezix.epizy.com/zelakewetedebimezotoralim.pdfIn PDF document text
    • https://c22e5cf4-338a-4003-9cad-c1cb0be29285.filesusr.com/ugd/3db607_9580ed513e9444419f1766979ff862e1.pdf?index=trueIn PDF document text
    • http://rukateridexak.rf.gd/best_resistance_band_exercises_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad0dd353-ce72-4f17-8360-e20fab14715e/rivolibufimitiwaxatagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7556fc49-a03a-4bad-bf50-ca5040b44f17/david_deida_ted_talk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92dc534f-aab0-473b-a8ee-389bddd9066d/sulirezuzuveguji.pdfIn PDF document text
    • http://tisedofefesowim.epizy.com/where_can_i_get_my_pressure_washer_fixed.pdfIn PDF document text
    • http://tikolikenugim.epizy.com/nadogix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fa39528-18f2-4d7d-bf4c-4894a54fb643/57972643448.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FB 4480 bytes
SHA-256: 29ee59af394d2f4c4a92be6b45ac7767c99a19958206d49f92d93fc4afb9a82b
font_01_sfnt_off0001162a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162A 8988 bytes
SHA-256: 3ff3556b52afd5d64dafe4d8872d30606a066c27940ca7dd9782b640f4db37df
font_02_sfnt_off00012840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12840 12032 bytes
SHA-256: f64b0a6c3efde5c3484fdd3ab08e31fe17fe18ae97bc3fbfbd745c9b1a54d292
font_03_sfnt_off00015178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15178 16184 bytes
SHA-256: 8a4482bcc54efcbea476a2920195cbb114fd917aaa4978a0d7107a448ffcf82f
font_04_sfnt_off000166ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166AB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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