Malicious PDF — malware analysis report

Static analysis result for SHA-256 166209924214d968…

MALICIOUS

PDF

79.9 KB Created: 2021-03-25 06:13:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1cb028408fe0d64e98c28cf8628bfde5 SHA-1: 56e9439bb33ad8f5668cb73b9bd7e16bc73d5677 SHA-256: 166209924214d9688388eff20e869e47790c89b21bd2954c0a8540ef6454d66d
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 0.9964

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://vilenefex.ru/aws?utm_term=harry+potter+and+the+half+blood+prince+book+number PDF link annotation
    • http://sirovikokaxi.22web.org/38843930894.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420586/normal_5feb634aa1afd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460063/normal_6038231d29ef4.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/jhjEk1F/54904953470.pdfIn PDF document text
    • https://cdn.sqhk.co/wifuponi/0j61iic/flaxseed_flower_images.pdfIn PDF document text
    • https://cdn.sqhk.co/rukeditele/ghib5ih/43595390087.pdfIn PDF document text
    • https://cdn.sqhk.co/liguzalat/jsgez6J/toyota_avanza_2013_owners_manual.pdfIn PDF document text
    • http://muvibigi.22web.org/9608117953.pdfIn PDF document text
    • https://cdn.sqhk.co/bemoranoz/i3jcMxo/download_anime_girl_pose_3d_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/tupuvebafo/herYidH/anari_film_song_pagalworld.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480893/normal_601316cd15a98.pdfIn PDF document text
    • http://jazeforip.22web.org/7098709146.pdfIn PDF document text
    • https://cdn.sqhk.co/nakunadubux/Ujijghc/30928621792.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/ihBii5N/fukenixivalubuturab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498883/normal_5fcc0f7de74cb.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/hf4sljh/truck_driver_city_crush_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484818/normal_5fd6ec67d2e24.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duvufewitopemaw.rf.gd/vuvijo.pdfIn PDF document text
    • http://gexegufikide.epizy.com/fejijidekuxutokovekoj.pdfIn PDF document text
    • http://rinubef.epizy.com/womojemetalov.pdfIn PDF document text
    • http://poliwukumepi.rf.gd/desotupoxosiruzoguxegol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e53f3b6-64ad-4a66-9a4d-250d512a3354/tabla_de_equivalencia_de_unidades_del_sistema_ingles.pdfIn PDF document text
    • http://fuzimobikuxuta.epizy.com/71050818104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/331613a9-855a-4c39-ba6c-b5293fff669f/fozebijakivetokugewine.pdfIn PDF document text
    • http://nekoraxevab.rf.gd/kutafudasexeteniximulujat.pdfIn PDF document text
    • http://jopatodorijapu.epizy.com/30782339367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8acc4f8f-6f98-415e-8c2e-41f3dc6d3780/14844839556.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_off0000f944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF944 5484 bytes
SHA-256: 9cec423a652f399b41f24e5405667ed7d97cc791428bcf5ca7075b54f24fbc02
font_01_sfnt_off00010bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCF 11064 bytes
SHA-256: 0a970d29d548124481ed85648f1c37a871cdc6ae912cab00d235b6c4af647bdd