Malicious PDF — malware analysis report

Static analysis result for SHA-256 f44ce8d2b97bfff7…

MALICIOUS

PDF

70.3 KB Created: 2021-03-04 03:21:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2d3f50c54bce93301ff24d8a09b7ca81 SHA-1: 2405d4ae05106f6e49920645158302a3aad055e1 SHA-256: f44ce8d2b97bfff76218c7e3529a2f6ad02f8ce27c62f693186bc0078652c7e8
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly indicate malicious intent. The primary URL, https://ponafet.ru/wb?keyword=avid%20eleven%20rack%20guitar%20multi-effects%20processor, appears to be a lure designed to attract users searching for specific products.

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://ponafet.ru/wb?keyword=avid%20eleven%20rack%20guitar%20multi-effects%20processor PDF link annotation
    • https://cdn.sqhk.co/lojumisebu/UjbIhfA/morizoketigegowaporu.pdfIn PDF document text
    • https://cdn.sqhk.co/bufudoraxala/d8vRuSU/sonololaxexuvojuronoso.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/jjfjifS/space_shuttle_mission_simulator.pdfIn PDF document text
    • http://dovogonusiru.iblogger.org/fukexexisomutunib.pdfIn PDF document text
    • https://cdn.sqhk.co/lazujanaziri/dhctz3L/68224501214.pdfIn PDF document text
    • https://cdn.sqhk.co/finelega/ihc8Ihj/galaxian_arcade_machine_repair.pdfIn PDF document text
    • http://nutupiwerumad.66ghz.com/43835768832.pdfIn PDF document text
    • http://tiwikif.22web.org/92925380126.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/wazorixekunafob/manual_sonda_lowrance_elite_4x_chirp.pdfIn PDF document text
    • http://vipenugixegun.epizy.com/mobejojelilolivenu.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/dafolo.pdfIn PDF document text
    • http://bexipazo.rf.gd/android_10_release_date_samsung_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/afgan_bukan_cinta_biasa_dekade.pdfIn PDF document text
    • http://buzanokekeb.epizy.com/loto_equipment_specific_procedure_template.pdfIn PDF document text
    • http://lomuripejo.epizy.com/coal_power_plant_worksheet.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_off0000d462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD462 5620 bytes
SHA-256: c5411a917cb474756db41b6d741e6acc7446d99a8c1f696a5333c38c0977e013
font_01_sfnt_off0000e77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77F 10860 bytes
SHA-256: c690cf1e251b8481971f63534c1eb902522e250faa1e944d70974419a0e16099

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