Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f884c40978f234c…

MALICIOUS

PDF

83.7 KB Created: 2021-02-27 00:11:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: aa6989b04d0f3d2d78b1c9453afdbbb2 SHA-1: 13264bd6e124e2d89fd26e330b7c009cdde61240 SHA-256: 8f884c40978f234cdbe92a3013b84e3ff9ec1d5b98b72cd67d7908098fee9f00
126 Risk Score

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 0.9995

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://kuzutuzo.ru/strik?utm_term=sony+str+dn1050+price PDF link annotation
    • http://trendmobile.ru/guzugam15n9.pdfIn PDF document text
    • https://duzigolanulemo.weebly.com/uploads/1/3/2/6/132680867/3445345.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/three_major_criticisms_of_differential_association_theory.pdfIn PDF document text
    • http://pimazisiperej.iblogger.org/32034406587.pdfIn PDF document text
    • http://flipping-car.online/information_about_amphibians_in_the_rainforest4kg6e.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/deloxipopu.pdfIn PDF document text
    • https://cdn.sqhk.co/dopuwene/gjhfUGg/fighting_tiger_liberal_mod_apk_unlimited_health.pdfIn PDF document text
    • https://cdn.sqhk.co/dopiporajen/hjbgcMX/luvaxevoreruga.pdfIn PDF document text
    • http://tavafotuzefox.sportsontheweb.net/how_to_get_rid_of_1_best_friend_on_snapchat.pdfIn PDF document text
    • http://cz-nitrof.website/ruwunlo2en.pdfIn PDF document text
    • https://cdn.sqhk.co/dokamaruxif/Aiagdge/.pdfIn PDF document text
    • https://cdn.sqhk.co/novigigexuxo/Zjdjfhf/gerub.pdfIn PDF document text
    • http://smilex.club/wenavudigubotopihd3id.pdfIn PDF document text
    • https://zutafagufagupak.weebly.com/uploads/1/3/4/2/134235067/4fd9f.pdfIn PDF document text
    • https://dokebama.weebly.com/uploads/1/3/2/6/132681336/9424221.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/foxit_reader_print_multiples.pdfIn PDF document text
    • http://xejebowipuzusim.iblogger.org/how_much_does_a_private_investigator_cost_in_georgia.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://najefitisefema.epizy.com/barish_song_video_half_girlfriend.pdfIn PDF document text
    • http://watokugen.epizy.com/dungeon_master_guide_5_ita.pdfIn PDF document text
    • http://kugesiv.epizy.com/once_more_to_the_lake_critical_analysis.pdfIn PDF document text
    • http://savuxerekeze.epizy.com/93580125437.pdfIn PDF document text
    • http://webidiwotew.epizy.com/adenitis_mesenterica_diagnostico.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91B 5136 bytes
SHA-256: 9dd1e2a5ec63ed23cca09e8ad83b22ca61773a4510d466b1ac25de909fab2f81
font_01_sfnt_off00010aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA8 12600 bytes
SHA-256: 6c04456b932756e939eea82ac6449212f0f0245f99ce26fc0e0bc0ea259ff26b
font_02_sfnt_off0001335f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1335F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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