Malicious PDF — malware analysis report

Static analysis result for SHA-256 41648c4a337f7cc2…

MALICIOUS

PDF

80.8 KB Created: 2021-03-27 11:12:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78c84715173e082219dfe882dbc0bb61 SHA-1: 7a0d789675ec2cf808768d80c7ed70e2a857f593 SHA-256: 41648c4a337f7cc23b4098934aeebb550682786ee4ece6357a36bac4cd61aa4b
96 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 trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a vacuum cleaner manual, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/wix?keyword=hoover+windtunnel+central+vacuum+manual
    • https://cdn-cms.f-static.net/uploads/4387420/normal_601abcca4d980.pdf
    • https://cdn-cms.f-static.net/uploads/4495244/normal_6015d5e069571.pdf
    • http://tibetterrier.ru/texorefagbfg4b.pdf
    • http://sorewoforami.22web.org/fikotexokukipuzagi.pdf
    • https://cdn.sqhk.co/kupujape/Dryhfia/kukurabufopitagofawafek.pdf
    • https://cdn.sqhk.co/xiditado/gg8DZji/towegajiletoniraz.pdf
    • http://ru-payment.casa/pujopusu1kamy.pdf
    • https://cdn.sqhk.co/jemitaso/Lihbthh/soul_knight_codes_2020.pdf
    • https://cdn.sqhk.co/vituxezij/igihbib/paluziwifokijijozijex.pdf
    • http://stroy-level.ru/i_wish_you_could_feel_what_i_feel_quotes9e6gl.pdf
    • http://sputnews.com/dagoduxunopesabojuniluy2ulj.pdf
    • https://cdn.sqhk.co/xufaribo/XugeBic/go_karts_for_sale_in_memphis_tennessee.pdf
    • http://testvvd.xyz/88050852298ujr27.pdf
    • http://instas.site/hp_officejet_6830_printer_driver_download53hr9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/83735de3-cc26-4f93-b17c-bb8141c8af17/xizunevesukabikox.pdf
    • https://uploads.strikinglycdn.com/files/1e9d769c-5916-482f-8545-f865985bb140/vuneramevukedilerokejif.pdf
    • http://dulubuli.rf.gd/hardin_county_ohio_sheriff_reports.pdf
    • http://dimexibagumaza.epizy.com/31864193933.pdf
    • http://xakosafejel.epizy.com/zezim.pdf
    • https://uploads.strikinglycdn.com/files/82250de0-93f9-4ecf-b761-d65fad917d68/86757825220.pdf
    • https://uploads.strikinglycdn.com/files/1c24ffa8-d425-4ec0-857f-4a496344692d/wijakuxepimalobibab.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f75e.bin
4fea577739f79b7510cb1e5ceda44d1081f5228627bb75ecd73b9b08af87af88
pdf-font-stream PDF embedded font (sfnt) at offset 0xF75E 5020 bytes
font_01_sfnt_off0001086e.bin
5fbe7f2af6e2848e656c0d3f0934275e0a8ffba71d7458e932b58e9775d958eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1086E 14508 bytes