Malicious PDF — malware analysis report

Static analysis result for SHA-256 0412166ce13564d3…

MALICIOUS

PDF

83.3 KB Created: 2021-03-21 22:36:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e820398a19a71c14925a9d28f18d65f1 SHA-1: ed3d1301f8ad0a5e6decd37aa5eb96d1fcf50b87 SHA-256: 0412166ce13564d3a2df2c552c7e69ffea1a7194c42e15d515003e8c5acaafd0
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs, such as 'https://mezovuduw.ru/aws?utm_term=yamaha+r6+parts+catalog', are likely used to redirect users to phishing or malware sites. The document body, though heavily obfuscated, suggests a lure related to a 'Yamaha r6 parts catalog'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=yamaha+r6+parts+catalog PDF link annotation
    • http://zabolojisag.getenjoyment.net/xozum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459177/normal_60252e1baed7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415934/normal_602623f321a0f.pdfIn PDF document text
    • http://reduslimitaly-official.website/normas_aduaneras_cuba_2019_apkbdvx1.pdfIn PDF document text
    • http://biwedujurar.mywebcommunity.org/english_for_business_communication_calicut_university.pdfIn PDF document text
    • http://trysucre.pro/kunujijizewidowavajexyoa.pdfIn PDF document text
    • http://tublitalia.space/24192376248h0f7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454545/normal_602778507a411.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_600ae4d88fd49.pdfIn PDF document text
    • http://kawasus.scienceontheweb.net/bodas_de_sangre_resea.pdfIn PDF document text
    • http://kapovulup.mywebcommunity.org/mukekew.pdfIn PDF document text
    • http://jidameke.mypressonline.com/93398603359.pdfIn PDF document text
    • http://table-wait.com/sutiwutidehdrip.pdfIn PDF document text
    • http://wonozudobitisog.scienceontheweb.net/top_rated_cordless_phone_for_hearing_impaired.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zujakogi.onlinewebshop.net/catholic_holy_bible_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/defba509-6701-4bc4-9132-120489b83319/vonojunuvazidupudewemaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a498dcc2-4f7f-4300-85ad-87682d6fa64c/28829781708.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5be1f08b-79c3-41d0-be39-5cff9e6ff974/48263097384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc76835b-376c-4b86-9eec-378ba2b09304/science_literacy_warm_up_answer_key_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f9dff42-ec31-4515-9da5-9bcaca2735ef/95398995948.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_off00010429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10429 5464 bytes
SHA-256: 168a36585f0e2b455a7dda285e38bb47423a5cf65a36d70f39ac5e8120c2c726
font_01_sfnt_off00011692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11692 12268 bytes
SHA-256: ab2080166104ac8acca3ca42616be87b39c5d149138cbc1c21c927b026317039

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