Malicious PDF — malware analysis report

Static analysis result for SHA-256 933d01e4942b2fdc…

MALICIOUS

PDF

70.7 KB Created: 2021-02-26 05:00:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1633a1f58f8f8f4502b088b9a26de78c SHA-1: 5d42cfa6c2414d41a2cebffbd618f63af0de6fd1 SHA-256: 933d01e4942b2fdcdcdbabf74ddef3aa31dde3a0687a14aad7b1543bb4ea18fd
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically appearing as a search query result. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

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://jacksth.ru/award?keyword=can+you+connect+ethernet+to+cable+box PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383450/normal_5fd6988d2d5f3.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/1914384626.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/carta_de_derechos_de_puerto_rico_resumen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457279/normal_5ffe994d4526a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_601b748badf52.pdfIn PDF document text
    • http://copyrighthelpptteam.com/gedado6fsq5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461746/normal_5ff54ff286bd9.pdfIn PDF document text
    • http://kostlike.site/bolt_movie_in_tamil_dubbedn3qz3.pdfIn PDF document text
    • http://reassurez-moi-fr.info/how_to_use_shark_professional_steam_cleanernmtz7.pdfIn PDF document text
    • http://dizititakozazi.mywebcommunity.org/what_are_the_three_negative_effects_of_volcanic_eruptions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://desixomagi.epizy.com/who_sings_nessun_dorma_the_best.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/bodyweight_workout_for_back_and_biceps.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/reviews_shark_ion_robot_vacuum_r75_with_wi-fi_rv750.pdfIn PDF document text
    • http://zunuwovadete.epizy.com/internet_manager_kuyhaa_2019.pdfIn PDF document text
    • http://zaxukesaludu.epizy.com/yamaha_banshee_workshop_manual.pdfIn PDF document text
    • http://powosudiruz.rf.gd/a1c_equivalent_blood_sugar_levels.pdfIn PDF document text
    • http://dazidotidipo.rf.gd/puboka.pdfIn PDF document text
    • http://fibotemirazopo.rf.gd/latiwubeditup.pdfIn PDF document text
    • http://nolonogatifotop.epizy.com/65936866932.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_off0000da33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA33 4924 bytes
SHA-256: d6cb6d128753be8544b09a3950da3fbd688f7ce0878234fd0a6351e79b10a269
font_01_sfnt_off0000eaf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF8 10184 bytes
SHA-256: 79b6112baea3235b193ceaa52583ef07000ba08142381e108dff984b90909e45

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