Malicious PDF — malware analysis report

Static analysis result for SHA-256 b47f2788c589c2c7…

MALICIOUS

PDF

88.0 KB Created: 2021-03-25 10:12:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4e6d8e5b146d9a62cf3b7c95131e0b70 SHA-1: def0d4ce9f96b972374e7fea74693629b53e4da9 SHA-256: b47f2788c589c2c79175d94c19ad1220d12ababfbedc9cfc3b711db78d3d1deb
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'Deadlands core rulebook' and 'wkhtmltopdf', likely serving as a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/strik?utm_term=deadlands+core+rulebook PDF link annotation
    • http://chistohome.moscow/905454668lmd89.pdfIn PDF document text
    • http://sberhome.ru/disney_world_park_hours_august_2020h2dmj.pdfIn PDF document text
    • http://xanusojuruxu.sportsontheweb.net/heats_of_reaction_and_hesss_law_lab_flinn_answers.pdfIn PDF document text
    • http://ibkreactiva2020.com/periva6t928.pdfIn PDF document text
    • http://hookup671.site/mebujuwefironovefuwogeg7d2ln.pdfIn PDF document text
    • http://sfhgfje5df.xyz/54568908599bqqjg.pdfIn PDF document text
    • http://xoxanuf.mygamesonline.org/el_camino_del_guerrero_pacifico_dan_millman.pdfIn PDF document text
    • http://bioforce-co.site/6134600428985zlj.pdfIn PDF document text
    • http://1offpark.xyz/walmart_black_friday_ps5_in_storerqzuo.pdfIn PDF document text
    • http://tameeniraq.com/xidinekatewobanefexedivex7iun9.pdfIn PDF document text
    • http://steelsho3.club/17207130503qkj0m.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/tivo_slide_pro_remote_manual.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://sowinoto.epizy.com/wifewefudaxopubutelokumot.pdfIn PDF document text
    • http://domumulavonevef.rf.gd/17665196528.pdfIn PDF document text
    • https://3edbbcf3-b5b1-446e-9630-835d38fa79e0.filesusr.com/ugd/6908d7_e47c19e8f88340b6b3fa5536132d4450.pdf?index=trueIn PDF document text
    • http://maridilalo.rf.gd/el_astronauta_de_palenque.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/henry_law_and_its_application.pdfIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_ec055f88a11a47c699da693828216097.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fixararololu/9836329812.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/jerusalem_jez_butterworth_watch_online.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_off00010e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E61 4888 bytes
SHA-256: 8110125824596528a1fc15c422a77a29a5cf17c846f63018535a3430092bb6cd
font_01_sfnt_off00011f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F03 11172 bytes
SHA-256: 73252e086b681d9aa9cfb1554e8cbc8fe3959b08bd34235d50ae8fde975fad1a
font_02_sfnt_off00014504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14504 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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