Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc9ca8d96f0e944b…

MALICIOUS

PDF

77.6 KB Created: 2021-03-09 17:02:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cdf051e1e07078a76e4105b1fa2b6c48 SHA-1: be6b17ae75fc36399e98bbc0649e920ed2755caf SHA-256: dc9ca8d96f0e944b6e609d52b2bd46422dc5982709aca5b1409efd93c05bc7a8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or domains associated with link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure, likely attempting to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/wix?keyword=clive+barker+books+of+blood+pdf PDF link annotation
    • http://kawafopi.mygamesonline.org/convert_mp3_to_midi_online.pdfIn PDF document text
    • http://caterm.ru/27848904840vba96.pdfIn PDF document text
    • https://cdn.sqhk.co/nazujovo/gsgciiE/89524472293.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/3hajitU/donizajafirobizopu.pdfIn PDF document text
    • http://probmake12.xyz/merit_badge_worksheet_personal_managementkwykr.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/descargar_drivers_hp_pavilion_dv5000_windows_xp.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/H0ihdcd/bulletproof_crazy_games.pdfIn PDF document text
    • http://tehnotop.space/how_to_access_my_icloud_account_on_androidaianj.pdfIn PDF document text
    • https://cdn.sqhk.co/nodujugebi/Rheggij/12357177165.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/iik7jg7/64719353713.pdfIn PDF document text
    • http://totipuzuforaz.mywebcommunity.org/zovota.pdfIn PDF document text
    • http://snapchat-alert.com/dork_diaries_115go94.pdfIn PDF document text
    • http://vojemodipu.sportsontheweb.net/the_blind_assassin_essay_topics.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/fedufiporara/lutatilot.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/sibujolisikudukuwop.pdfIn PDF document text
    • https://cceb078e-1df6-42b0-9e12-359f30e42f1d.filesusr.com/ugd/e8506d_5a0f65eb05354be8a5489d377dcc4320.pdf?index=trueIn PDF document text
    • https://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_9d8159c4f0864304a8e4043329f3ad7b.pdf?index=trueIn PDF document text
    • http://xomapagovujux.atwebpages.com/fisagasa.pdfIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_40da3df2bd8d4b0ea1e1c3f3e42d9f6b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/nursing_diagnosis_examples_for_pain.pdfIn PDF document text
    • https://eff7b67d-fef5-45b7-bcd6-ffb1b71d3a14.filesusr.com/ugd/b4c9df_324d43c1afe545e1a0d7b8d4906c9a5e.pdf?index=trueIn 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_off0000f372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF372 5204 bytes
SHA-256: 3298bafaa3dd53e6a885351b1510e633f204b281ed1ff8294d5f55153c9280fe
font_01_sfnt_off00010533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10533 10372 bytes
SHA-256: d9ee1c1c286fd4e54989eac0a2cb05eba708fda4ce69e9cb5c85a10eea66ab7b

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