Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae83faeabc4acc1…

MALICIOUS

PDF

92.0 KB Created: 2021-05-15 01:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0a7747d90a79df93de84a0c5120c207b SHA-1: 2100e14d36c23be0f0c49f606653509e158622d8 SHA-256: 0ae83faeabc4acc1fa5ad3c8d054c5b796268e0514dc775561f1babf2eef4a1d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=insinkerator+evolution+spacesaver+xp+troubleshooting PDF link annotation
    • https://cdn.sqhk.co/gubisagebuto/ig3jcif/sexavubu.pdfIn PDF document text
    • http://pupigojoniru.mypressonline.com/40187321801.pdfIn PDF document text
    • https://mepodatadun.weebly.com/uploads/1/3/1/4/131452799/2ccf6d3d798db52.pdfIn PDF document text
    • https://cdn.sqhk.co/feneradebeza/cA3bghJ/75704978865.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/b7IjcjQ/virexuterun.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/ejihbgd/76374423430.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/dB9gKgi/bufewavafibolisaviwi.pdfIn PDF document text
    • https://budogifu.weebly.com/uploads/1/3/0/8/130874026/nilos-mumugamifako-pebezox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zovixis.epizy.com/concavity_and_inflection_points_worksheet.pdfIn PDF document text
    • http://bilofudako.onlinewebshop.net/antologia_del_terror.pdfIn PDF document text
    • http://wuxosalilujaza.atwebpages.com/70576117070.pdfIn PDF document text
    • http://wutorokanotomav.onlinewebshop.net/dcs_world_f-15c_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/hssc_declaration_form_annexure_e1.pdfIn PDF document text
    • https://13ea8442-998f-4f14-ba3b-7f37e53a414c.filesusr.com/ugd/008a9f_9292d9dc5de64d808ba0b43f2ec5f6c9.pdf?index=trueIn PDF document text
    • https://336ddc11-c37d-4cd6-9685-7accad2975f7.filesusr.com/ugd/479fa9_7434527d2b86436bb33b24133f89c88d.pdf?index=trueIn PDF document text
    • https://f0198b83-f3fe-41b4-8315-bacd7eabb238.filesusr.com/ugd/2b3f46_5f035e3b87544ef99833c41b1f442e78.pdf?index=trueIn PDF document text
    • http://ropajevunowijit.epizy.com/13387787175.pdfIn PDF document text
    • http://vonanovab.epizy.com/2970579423.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/why_does_my_skin_burn_but_no_rash.pdfIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_7c867aec373247b4a615e08e66cb7d80.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tezude/how_to_improve_at_public_speaking.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_off000127ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127EF 5464 bytes
SHA-256: 1ed8761b6e388a18ec22fd8c1a9bbac92ab32d578fc7232b330b293caaf516d3
font_01_sfnt_off00013a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A8B 11812 bytes
SHA-256: d53f892cd89b1714ca2664c07e08ce4987a5c028f64cf3c261bffeced7d87d65

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