Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1749f09198120f4…

MALICIOUS

PDF

68.9 KB Created: 2020-12-02 02:39:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3bd318f80440704126e135947be487db SHA-1: b958af312f3eb402aa275605097818a1bc1ac0c2 SHA-256: d1749f09198120f4762cea30438c0ed46e1f21c46d4dd840fb07a36e89b39ada
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The embedded content, though heavily obfuscated, suggests a lure related to a "Gold rush season 6 episode guide". The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the primary attack vector appears to be directing the user to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/strik?utm_term=gold+rush+season+6+episode+guide In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kakef/sql_server_2012_express_32_bit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eacbc14dfd36fef1915a/t/5fc17286f3de5e49b59b48ea/1606513287129/goxupubowowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e85626-74fd-461e-892e-f25f94bc99e2/49769774270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c555ff4e-0430-468a-ae9a-a64a852b62d5/what_is_soma_used_for_in_brave_new_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27e06073-80f2-4362-98d4-ddbb204d990e/40424802022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/462a2543-6062-45c5-8996-dea38c8b97f9/jitilujagetajisere.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c48c104edf1d778017d3/t/5fc147027acac6192aefc667/1606502149191/goulds_pathophysiology_for_the_health_professions_5th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/wastewater_treatment_plant_design_project.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f9f708f-3308-47f3-9af5-a2281eea4260/68856939460.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91c3aa14-def5-400c-9804-504570b751ae/ready_player_one_gundam.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/tudosoxisogof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a65148f6-cee8-4f83-b969-0114348c6921/doxuvufenizoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28a82d36-a206-432f-9883-a6b6ce07e31b/jenetipikageta.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_off0000d00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00C 5404 bytes
SHA-256: 54e46c608ff526d3725028635367581de4cc4f5ba31a40d0a2bb21648ef5cc3d
font_01_sfnt_off0000e263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE263 10912 bytes
SHA-256: 23585eb25844b002e1d4ecf10376270d264fea8c23a795241022a60d80955cf8

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