Malicious PDF — malware analysis report

Static analysis result for SHA-256 b202e24272cca689…

MALICIOUS

PDF

96.6 KB Created: 2021-03-18 16:15:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2ffaf2958ef4132de8e2deb190dbdbd8 SHA-1: 5cc5829c8360947331bd8144b644e14a03451062 SHA-256: b202e24272cca68971c033b1ae97d68dc3fc4f02b223d6e5807473c24d67fa64
186 Risk Score

Malware Insights

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

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 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=data+acquisition+system+definition+pdf PDF link annotation
    • https://dobetabuzaduguz.weebly.com/uploads/1/3/5/3/135312815/7211621.pdfIn PDF document text
    • https://cdn.sqhk.co/videmixolute/ujcjehj/castle_of_illusion_ps3_disc.pdfIn PDF document text
    • https://jitebemaduk.weebly.com/uploads/1/3/4/6/134692965/5085591.pdfIn PDF document text
    • https://wemivera.weebly.com/uploads/1/3/4/3/134311686/9881928.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/glkiijh/37947139217.pdfIn PDF document text
    • https://cdn.sqhk.co/retepisej/iWmhiha/rekusada.pdfIn PDF document text
    • https://guwusupokase.weebly.com/uploads/1/3/1/4/131437041/1d0f83.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/iGahfjh/36923425338.pdfIn PDF document text
    • https://daxogane.weebly.com/uploads/1/3/2/8/132815110/6d62ba7e41007d.pdfIn PDF document text
    • https://niromovikusuzu.weebly.com/uploads/1/3/4/6/134651616/8451091.pdfIn PDF document text
    • https://cdn.sqhk.co/mepejuwaj/doRhije/cucumber_js_generate_report.pdfIn PDF document text
    • https://cdn.sqhk.co/gitaligido/pJhbbta/51520345554.pdfIn PDF document text
    • https://cdn.sqhk.co/bipozipo/jaDGgfz/vitamin_d3_5000_iu_costco.pdfIn PDF document text
    • https://sobomevoza.weebly.com/uploads/1/3/0/7/130739746/vominefumara.pdfIn PDF document text
    • https://pukegivox.weebly.com/uploads/1/3/1/8/131856392/2585797.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/223ad981-b3a6-40f7-9016-bad64be32333/they_say_i_say_chapter_3_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b0ab5b-6a73-44d2-9857-8feddb7d0b3f/sugiva.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/kadekomizamilej.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/83118387796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7f6c36c-0bc4-461b-8981-7644f47a984c/81533249479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e84e156-9a45-42b9-91fc-d8998b811a04/is_there_going_to_be_a_new_phantom_of_the_opera_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/lagu_arirang_cover_bts_ilkpop.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/catia_v5_license_manager.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/10212814.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_off00012ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE3 5400 bytes
SHA-256: d1b1e6581e4659683b3d1366e5785df9da2528521a44e854cddd71fad11e6afe
font_01_sfnt_off00014145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14145 15896 bytes
SHA-256: f1b9a6da3d613d0687967093e530b33cb611e4090087d6c17efd20737f3bf672