Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a05d6c34c933549…

MALICIOUS

PDF

67.4 KB Created: 2021-02-01 00:02:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 75a185c12557669d0fe496ce25711260 SHA-1: 9d0065d12a660a4eb561971f0b9e847d84111f86 SHA-256: 6a05d6c34c933549a8143b703f2ff7790273e841fd9933bde968d1b7f254d623
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious and likely phishing-related. It contains a large number of embedded URLs pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate effort to create a link farm for SEO manipulation or to host malicious content.

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/123?utm_term=103%252F120+buckley+street+essendon PDF link annotation
    • http://detonic-buy.website/werewolf_game_rolesm8ny5.pdfIn PDF document text
    • http://idealicaufficiale.website/atlas_of_procedures_in_neonatology_free_downloadoyrpp.pdfIn PDF document text
    • http://adyga.site/2015_ap_lang_synthesis_essay2y4r9.pdfIn PDF document text
    • http://mybiol.site/rihanna_man_down_lyrics_song_meaningsnnxl.pdfIn PDF document text
    • http://gimogorox.22web.org/80797561640.pdfIn PDF document text
    • https://bagugesi.weebly.com/uploads/1/3/0/7/130775983/709578.pdfIn PDF document text
    • http://mantenancie.com/88037205371txg2g.pdfIn PDF document text
    • http://site-shop.xyz/tososenomykkn1.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/jhqAIZ2/xuzukenukugimelasotoxev.pdfIn PDF document text
    • http://pravagims.net/moo_a_novelq3arg.pdfIn PDF document text
    • http://makamar.tech/el_alquimista_de_paulo_coelho_pelicula_completa_espaolnj3o2.pdfIn PDF document text
    • http://itclick.pro/flow_free_app_downloadmdakp.pdfIn PDF document text
    • https://cdn.sqhk.co/wasefago/BBxIQhb/dragon_quest_minecraft_games_in_order.pdfIn PDF document text
    • http://petajofap.22web.org/12095372799.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF89 5296 bytes
SHA-256: efd26819d9bbbc87a55efa6f16784271f1d7ef494e7cf3982b951fafca8d93e4
font_01_sfnt_off0000d19a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19A 9676 bytes
SHA-256: 1e4ee82cb18e0861f072c2fd0cddf7217bd6850291ec13a7c014d3a5f7404c63
font_02_sfnt_off0000f2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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