Malicious PDF — malware analysis report

Static analysis result for SHA-256 632b3c08a20820f2…

MALICIOUS

PDF

79.6 KB Created: 2021-03-18 06:49:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2f2191c494932419916907b0819df2d3 SHA-1: e144232fcfad72b19472c11e522738d3c7c3bd83 SHA-256: 632b3c08a20820f2003612c30497d64b280ccbaebdb06fe2466a29a203b679ac
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with a primary focus on directing users to 'fokemale.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting a malicious intent to distribute or redirect traffic. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=what%2527s+another+word+for+clearly+stated PDF link annotation
    • http://gukibiminaz.iblogger.org/xowizozurinifexinobabuguj.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/Vhgjfjd/can_you_escape_horror_castle_2_walkthrough.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497082/normal_603e67990e755.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425506/normal_60279d0d3d419.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/jqyrhfH/74498344527.pdfIn PDF document text
    • https://cdn.sqhk.co/kinifukix/iNhfVjg/89195227114.pdfIn PDF document text
    • https://cdn.sqhk.co/gizivapejoko/dJ3gQhh/memento_mori_gdr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487206/normal_6033a67d0d722.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4fcc26ae-a476-48f2-98aa-cdc5c12f4544.filesusr.com/ugd/32d0e1_af4c8b762f5c483b85f8ef43aea873cf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/palevijuj/gugalenaxakoradepuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/jebonunedimugugijoxu.pdfIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_99406f1736db4e4bac07333361b1fd11.pdf?index=trueIn PDF document text
    • http://wozurowimure.epizy.com/74826494041.pdfIn PDF document text
    • http://filivuso.rf.gd/motesupubafulagorof.pdfIn PDF document text
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_5d62baaa83544146a631f49c366951a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/sibabiletonol.pdfIn PDF document text
    • http://ketaxijos.rf.gd/77187354771.pdfIn PDF document text
    • http://futilanejorowof.epizy.com/jezuwijal.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_off0000f835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF835 5348 bytes
SHA-256: a570710c4a44f59798d8864219ce6862cf1b6483fe212555e975d5860fe78569
font_01_sfnt_off00010a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A82 11368 bytes
SHA-256: 04e855c87b3254331a841c41f0eb4cc6b786128ca191ab103352b79462942d25

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