Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c870a6ffd0c5e5f…

MALICIOUS

PDF

81.1 KB Created: 2021-04-28 09:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3361028179936f7acbbf5f2d13d3fec5 SHA-1: 52888c0c556a3a27d85ab1f75e5ca67a9e21d33e SHA-256: 0c870a6ffd0c5e5f6f125a2161893bdacba20c850e84a7974216e0e2c3049e3c
126 Risk Score

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 0.9998

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://druttle.ru/strik?utm_term=garmin+nuvi+3597+manual PDF link annotation
    • http://dozibasiwoman.iblogger.org/canciones_cristianas_con_acordes_para_piano.pdfIn PDF document text
    • https://cdn.sqhk.co/dadakafopina/GqXibig/kuxujofamadezib.pdfIn PDF document text
    • http://devlp.club/scansnap_s1300i_mac_mojavehamri.pdfIn PDF document text
    • http://xezixaz.getenjoyment.net/podizibatufemavofemozelir.pdfIn PDF document text
    • http://mon-cmbretagne.com/an_inspector_calls_bbc_bitesize_videos8l03c.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/glkiijh/37947139217.pdfIn PDF document text
    • http://septiki-rf.website/ncert_solutions_for_class_9_science_physics_chapter_work_and_energylnaps.pdfIn PDF document text
    • https://cdn.sqhk.co/dozumapufa/nhejhSh/teaching_strategies_gold_objectives_2019_spanish.pdfIn PDF document text
    • http://tepoparupomo.medianewsonline.com/50708482397.pdfIn PDF document text
    • http://zumodaronomana.iblogger.org/73519178122.pdfIn PDF document text
    • https://cdn.sqhk.co/risevejuxik/XKCqrgc/23934905558.pdfIn PDF document text
    • http://useporte.xyz/laziloxujemutebudakivoxuc95bn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jirataser.rf.gd/becoming_a_supple_leopard_second_edition.pdfIn PDF document text
    • http://tipatanakuke.onlinewebshop.net/place_attachment_theory.pdfIn PDF document text
    • https://9539e3d7-93ad-434a-85ac-22bd9bdb82bb.filesusr.com/ugd/df7b34_454d156c8e3f4ae89f01850e40589c01.pdf?index=trueIn PDF document text
    • https://033f1a72-e514-447f-b44b-9d234b37386c.filesusr.com/ugd/f05202_895c06d827244a08938f613b4e1ab69e.pdf?index=trueIn PDF document text
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_06c0258012da4e6ab31527d8640a0bb2.pdf?index=trueIn PDF document text
    • http://teredibake.rf.gd/autocad_student_version_2018_free.pdfIn PDF document text
    • https://2ae8fa2d-8b21-4cd7-bd94-b44763fb9b4d.filesusr.com/ugd/8e1ec7_ae29d8319eb64c4e87b0516de788a5d9.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE0 5268 bytes
SHA-256: 8cb9a2879eb0b33b51804c2cc4e77cb59f915326f728544d02076ed6b685cf23
font_01_sfnt_off0000fdc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC7 10752 bytes
SHA-256: 6c397b8e1ac152eb43784af3f499081975a7e669fd81cc4d5fa9c669e6df93e5
font_02_sfnt_off00012288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12288 16064 bytes
SHA-256: 6f17b99764d671a96c0d2fd0b5f339513c2ddbf7efa5d755f63b897ad21dd613

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