Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c58cf12032db4c9…

MALICIOUS

PDF

86.7 KB Created: 2021-05-06 23:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 11d550ef426c49ee753a871d61531395 SHA-1: 83765f6fe8c3b33354e995da2576e84f4af22d5c SHA-256: 3c58cf12032db4c9a4b051c4c5189afddc80c0c8a0677b93253633378e41ed10
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://lozipotod.ru/strik?utm_term=ipibl-lb+sound+driver PDF link annotation
    • http://tiwilib.iblogger.org/arbol_de_decisiones_libro.pdfIn PDF document text
    • http://limecash.xyz/what_is_the_difference_between_mn_real_id_and_enhanced_drivers_license0tq17.pdfIn PDF document text
    • https://dubekanenek.weebly.com/uploads/1/3/3/9/133997540/forivetazani.pdfIn PDF document text
    • https://jogelobob.weebly.com/uploads/1/3/5/9/135961552/9369625.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455642/normal_600f884adfd6c.pdfIn PDF document text
    • http://komamoj.22web.org/jazuxateseg.pdfIn PDF document text
    • http://health-top.ru/how_do_i_use_my_canon_camera_as_a_webcam_windows_10a2pbp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464065/normal_60247887b8ea3.pdfIn PDF document text
    • http://halfraire.xyz/455491925717fjm5.pdfIn PDF document text
    • http://bipufides.22web.org/zuveselajinuzaximo.pdfIn PDF document text
    • http://easy-money-cash.space/loopnet_texas_multifamilybxov6.pdfIn PDF document text
    • https://ximavubakalik.weebly.com/uploads/1/3/0/7/130776508/a0b6b220707d54c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495399/normal_6036d6a1af6f5.pdfIn PDF document text
    • https://zifalopo.weebly.com/uploads/1/3/1/3/131379769/katijuzer_xinufoti_visutag.pdfIn PDF document text
    • https://wesonibisizigoj.weebly.com/uploads/1/3/0/9/130969529/sopij_tewesi.pdfIn PDF document text
    • http://tubudemawaxoki.iblogger.org/lajuzeroluj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xujiril.rf.gd/technique_appendicectomie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/799cefbf-6dc6-4bc5-87fc-409117ef541f/84743864623.pdfIn PDF document text
    • http://fadoxom.epizy.com/mokejik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bf36cc1-6e06-49b5-97d5-b69750f2fd54/9635030254.pdfIn PDF document text
    • http://zaxalamel.rf.gd/diwujagus.pdfIn PDF document text
    • http://bajivuselome.epizy.com/15779705068.pdfIn PDF document text
    • http://zagenududabeg.rf.gd/wulufepenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bcdb5a6-f1b6-486b-b8b6-3917788fda20/online_grammar_quiz_6th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32f84a1f-c64e-440e-8656-ed32a78eecb6/rupogurumuvusumijuwaxi.pdfIn PDF document text
    • http://kiguwodakoz.rf.gd/62464220917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cc36219-83fe-431e-8680-601b8af820bd/what_is_a_topic_sentence_apex.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_off00011680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11680 4912 bytes
SHA-256: 03ca68caf1c36419b71931260b23f68765e06db3a8246478fe1d356af53c1c41
font_01_sfnt_off00012746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12746 11180 bytes
SHA-256: 49bf1d6830787f67ec69dbfc70c590f63218b9df64def41595c88606de88472a

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