Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bdd6c5414ba839e…

MALICIOUS

PDF

72.2 KB Created: 2021-04-01 05:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7ab2a0235373096dada750fcf2204a67 SHA-1: 644a3e4ca73202dd9b23aaf15c4f044f30fd5c78 SHA-256: 1bdd6c5414ba839eb408036bf553f327f452d814a6347881679841200b16be2e
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, specifically as a phishing or trojan. It contains numerous embedded URLs pointing to domains that appear to be part of a link farm, suggesting a scheme to manipulate search engine results or distribute further malicious content. The document body, though heavily obfuscated, contains references to 'combiner plusieurs pdf en ligne' and 'wkhtmltopdf', indicating a potential lure related to PDF manipulation services.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/award?keyword=combiner+plusieurs+pdf+en+ligne PDF link annotation
    • http://tipijijajofupi.sportsontheweb.net/nifubu.pdfIn PDF document text
    • https://cdn.sqhk.co/jojojidatun/ihVqIgj/high_potential_players_fifa_19_cb.pdfIn PDF document text
    • http://xoroketogejuxe.mywebcommunity.org/hyderabad_metro_map_download.pdfIn PDF document text
    • http://medilawibume.scienceontheweb.net/rawaleti.pdfIn PDF document text
    • http://maritimog.medianewsonline.com/34393672798.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417319/normal_5fe01b85a79fb.pdfIn PDF document text
    • https://cdn.sqhk.co/miropefaneka/hfhbgcd/is_nano_magic_tape_waterproof.pdfIn PDF document text
    • http://viwesisikumebi.getenjoyment.net/bhagavad_gita_malayalam_download.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/dermatoglyphics_multiple_intelligence_test_software.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375083/normal_602c1e948f9f3.pdfIn PDF document text
    • https://cdn.sqhk.co/furaxofir/dshdzge/dunk_lords_xbox_one_controls.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/oijHghr/kufusaxojaga.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/tmhbjfP/sizebolaz.pdfIn PDF document text
    • https://cdn.sqhk.co/pomiwuximu/jhgukmG/archery_mule_deer_hunting_tips.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404515/normal_6006271faa410.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/Bjjjj1B/80188282450.pdfIn PDF document text
    • https://cdn.sqhk.co/xibidodoko/Fgf6Oji/63112599406.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/225c94a5-06a0-4922-9dfc-457afd9d4b88/pirates_of_the_caribbean_sheet_music_cello.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb0bfa3b-f616-4f7f-b639-5b76ae1a5bc5/45475157445.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9fe0aba-1ed1-46fe-8180-81dd3fc2ad26/77566902898.pdfIn PDF document text
    • http://wovibojo.onlinewebshop.net/jegikijodope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01bac4bb-7b0f-4012-9d28-c30fae6b2f40/monster_in_law_full_movie.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_off0000dc37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC37 5196 bytes
SHA-256: a6e7e7a0e51fad1db0263c4ac5c0096567d1a5fe5af602a554077653dae26bf4
font_01_sfnt_off0000edc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC5 11752 bytes
SHA-256: 42e4912abf661833f01fba74ff3d7a759cd1e2b54e9ff27f051962f2f8601c25

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