Malicious PDF — malware analysis report

Static analysis result for SHA-256 966e341778656452…

MALICIOUS

PDF

80.4 KB Created: 2021-04-02 13:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 81250afa45bf63bde96ba21836ccb1e8 SHA-1: 2e6fd597d11a962b27b8563c694f5769c3678d89 SHA-256: 966e34177865645245baa6004e48eb5ad8ec18d2911200ef36116105dffd28a6
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by multiple engines, including a high-confidence ML classifier and ClamAV. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to be a lure related to a common search query, directing users to a suspicious URL. No scripts were extracted, but the presence of numerous external links and the overall structure strongly indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=why+is+my+bissell+pet+won%2527t+suction PDF link annotation
    • http://letaraluzim.scienceontheweb.net/33186223973.pdfIn PDF document text
    • https://cdn.sqhk.co/lofesaxudiwo/gehegjP/mukez.pdfIn PDF document text
    • http://majexifavel.scienceontheweb.net/discrete_and_combinatorial_mathematics_5th_edition_textbook_solutions.pdfIn PDF document text
    • http://jixazepo.mywebcommunity.org/westworld_soundtrack_piano.pdfIn PDF document text
    • http://lalabomujulimof.mywebcommunity.org/vumumimadugafulal.pdfIn PDF document text
    • http://fofolep.mywebcommunity.org/63007368879.pdfIn PDF document text
    • https://cdn.sqhk.co/barevirus/fhd7gdi/88874582499.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/ggEbihK/odyssey_atlantis_dlc_ending.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/094460dc-60f9-4d4f-b370-4cafb2ef49bb/washington_football_team_2018_roster.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/bhai_bolte_full_hd_video_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04e3cc88-9fdd-41c7-b738-c2ac8024aa62/sozinipipop.pdfIn PDF document text
    • http://japinoxizidunub.myartsonline.com/chrome_adobe_flash_2021.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/yaesu_857d_manual.pdfIn PDF document text
    • https://ddc7b23b-31e5-4b5c-aaad-d3b7cef26861.filesusr.com/ugd/e506b8_7e939c6df52a44a19f8f540d5022dcd8.pdf?index=trueIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_3ecb2ca14d9f4630b82325393d343810.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/durugupuwibilo.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/59518925447.pdfIn PDF document text
    • http://jemukiguwuw.myartsonline.com/the_lusty_argonian_maid.pdfIn PDF document text
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_7353e3ce376448fab989465239d6b212.pdf?index=trueIn PDF document text
    • https://7054f9d6-44ea-4b6c-8535-0d04e7cb9957.filesusr.com/ugd/963b03_16adcfc10c8d40719debaf55efcc87a3.pdf?index=trueIn PDF document text
    • http://lojubefogugiku.onlinewebshop.net/efek_amfetamin.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_off0000fccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCD 5248 bytes
SHA-256: cdb7bbbfa2e354477e04e70db6f60bf1a235cf2071876efe8de8596042e9dde2
font_01_sfnt_off00010eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAB 10940 bytes
SHA-256: 4b0eb021b9e55911cd48cf522c04bfcc8d380656f25139fcc6b11e6e1afed705

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