Malicious PDF — malware analysis report

Static analysis result for SHA-256 b26d77fc977b1a3c…

MALICIOUS

PDF

75.4 KB Created: 2021-02-26 17:15:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e22423f379a043a69b46317aacb46251 SHA-1: b8c3047b5329cff1aeffb750f02c689e768883cb SHA-256: b26d77fc977b1a3c53809992b90717d90078855fee56af2974a0d6631e7f0ec9
126 Risk Score

Malware Insights

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

The PDF document contains multiple external URIs and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to popular search terms, directing users to various domains. The presence of numerous links and the ML detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/award?keyword=a+discovery+of+witches+season+2+cast+list PDF link annotation
    • http://mignonette.space/kendo_grid_header_template_checkbox_angularxes21.pdfIn PDF document text
    • https://cdn.sqhk.co/jasojime/pEVNiet/royal_chaos_banquet_guide.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/gegatisejegeragoku.pdfIn PDF document text
    • https://cdn.sqhk.co/suzeboxiwo/4jgghid/raid_shadow_legends_pc_cheat_engine.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/Thigigi/tobanumitakudiralojidi.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/why_is_my_fridge_freezer_leaking_water_underneath.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/c4gdghe/cute_animals_cartoon.pdfIn PDF document text
    • https://cdn.sqhk.co/pujapipiwat/geUcMgf/free_music_player_mp3_player.pdfIn PDF document text
    • https://cdn.sqhk.co/komagiju/hjeLeib/36562955033.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/Dhcgfge/equalizer_2000_gun.pdfIn PDF document text
    • http://copyright-helps-team.com/soul_of_a_citizen_chapter_12_summarygd3xv.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/eQhRiio/battle_tank_1990_rom.pdfIn PDF document text
    • https://cdn.sqhk.co/tategupet/iY45whh/cosmos_interview_questions.pdfIn PDF document text
    • http://savadaqwe.space/zubekuwiguqt4b.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/81113825959.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://topufopotu.epizy.com/dopuxavawaveguwewekoje.pdfIn PDF document text
    • http://rawigukegopafot.onlinewebshop.net/wosotojevomozixakudewi.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_off0000eaee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEE 5484 bytes
SHA-256: 7a20b63352f2e7cbffa3077cd5cbd160f9436664c05c77c40c988e7f9165b2e5
font_01_sfnt_off0000fdb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB1 10148 bytes
SHA-256: f69fe43fe1f25f7450c766bae55bb6c5e0d9df7662568495bfe60e69c7a85346

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