Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b1c4fb4285c2dd5…

MALICIOUS

PDF

94.2 KB Created: 2021-02-27 19:32:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d9ec27778e98b89294aaf7d9af8495c8 SHA-1: 02d0e1e3c90b303d4ec1b6a6cf416651179174be SHA-256: 5b1c4fb4285c2dd5ef4e4c5156c7c88be64f66a47dd085c5de4ff686ce125975
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, with a primary focus on `https://mezovuduw.ru/wix?keyword=2020+ohio+libertarian+primary`, suggesting a phishing or redirection scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is designed to host many links on disposable domains.

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://mezovuduw.ru/wix?keyword=2020+ohio+libertarian+primary PDF link annotation
    • https://cdn.sqhk.co/bozadukopufu/ghHWhg1/terminator_dark_fate_trailer_2_review.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/88624848964.pdfIn PDF document text
    • https://cdn.sqhk.co/debefuki/yic7Big/real_car_drift_simulator_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mudemodox/hgdgbha/fox_stickers_wastickerapps._com.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/37355780069.pdfIn PDF document text
    • https://cdn.sqhk.co/vukixukafoga/ghLUjfk/best_gun_build_tarkov.pdfIn PDF document text
    • https://cdn.sqhk.co/patemugimej/6upghje/ads_b_flight_tracker_app_ios.pdfIn PDF document text
    • http://zanedasimitavo.22web.org/aluminium_foil_sheet_manufacturer_in_china.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/ieja8gd/warhammer_battle_magic_box.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/napoledunadigo/75884018084.pdfIn PDF document text
    • http://bifuganikidaliv.epizy.com/liridusox.pdfIn PDF document text
    • http://fanevisexika.epizy.com/clear_mind_same_words.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/comcast_remote_code_for_tcl_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/from_dusk_till_dawn_movie_mp4.pdfIn PDF document text
    • http://mafevela.rf.gd/calendar_2019_word.pdfIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/vegobufixenetugigire.pdfIn PDF document text
    • http://luvebex.rf.gd/41376719639.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_off000129d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D9 5300 bytes
SHA-256: 551cf08b512bb16a069c902e4b30935ddc8f218397b7c87ddc17f566506b0bd4
font_01_sfnt_off00013bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BB3 15256 bytes
SHA-256: 7bbc42aa07c6e8ab49593e50bbc925ceb45be8b56061b07b88baf0da43d86af9

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