Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ebe1def907669bc…

MALICIOUS

PDF

70.0 KB Created: 2021-02-28 21:06:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2b7ada5fc253bb0fd7f0cd23915bf235 SHA-1: b0fec2c756d8c13f1518e7c6cb3bbd414645da04 SHA-256: 6ebe1def907669bcd62a5d5ee54edec7946a5ac393ecfa7516284335c46e35f8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, with at least one, 'https://zajinet.ru/123?utm_term=panasonic+tc-p42c2+vesa', appearing to be part of a link farm designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to host a collection of links on disposable domains, a common tactic for distributing malware or conducting phishing campaigns.

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://zajinet.ru/123?utm_term=panasonic+tc-p42c2+vesa PDF link annotation
    • http://dupomixu.iblogger.org/cartoon_bird_pic.pdfIn PDF document text
    • http://zalanikovuz.iblogger.org/stephen_king_scary_movies_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzewekafan/Iidjcic/pulse_secure_error_1329_windows_7.pdfIn PDF document text
    • http://mukatadirez.iblogger.org/covalent_bonding_worksheet_chemquest_22.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/5x1ihhe/88198758710.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/je6jhjf/16290712174.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/d3LosL0/quest_town_saga_mod_apk_1._3._0.pdfIn PDF document text
    • https://cdn.sqhk.co/jugemito/ojeXoRC/53327690546.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/FyiexYk/interstellar_rocket_league_car_designs.pdfIn PDF document text
    • http://mokexuvukidifek.iblogger.org/50744698049.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzededoz/cggQfie/cross_stitch_saga_apk_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dagasopones/74917220234.pdfIn PDF document text
    • http://nuvefugokudob.epizy.com/blocksite_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/panasonic_breadmaker_sd-_2501wst_manual.pdfIn PDF document text
    • http://ruzojonawa.epizy.com/korean_face_sheet_masks.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/bionic_contact_lens.pdfIn PDF document text
    • http://wogomud.epizy.com/nanurigetaxifadu.pdfIn PDF document text
    • http://xagadikexebixa.epizy.com/the_book_of_secrets_osho_price.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/heart_anatomy_diagram_worksheet.pdfIn PDF document text
    • http://merapuw.epizy.com/texas_hunters_safety_course_test_answers.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_off0000cfc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC9 5112 bytes
SHA-256: bbe1816421ef474b28a8df8bb644a4eefb78f9a21d476f6ac79a5ce3ee29c16b
font_01_sfnt_off0000e15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15F 12660 bytes
SHA-256: 7ec5eed4b2641ff332c002526f66f8399155fd47dcad6339768a11a0dec6acb7

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