Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c777b5c3aff692…

MALICIOUS

PDF

173.3 KB Created: 2021-02-14 12:18:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c1dd85a8fc06d52880322392642e7a1e SHA-1: c93edce7b81fdb7a85d87a784efb2a4f8e0bafd9 SHA-256: 29c777b5c3aff6920994717f5bdaa205a35dd6ea01659775e73269f8aa1fb371
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for redirecting to known malicious infrastructure. The document contains numerous embedded links, many pointing to disposable domains and potentially acting as a link farm. The presence of these links suggests an intent to direct users to malicious websites for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=congruent+triangles+and+rigid+motion+worksheet+answers In PDF document text
    • https://purotuduveb.weebly.com/uploads/1/3/0/7/130738796/0e0f271e3c6bd5d.pdfIn PDF document text
    • http://jaraxusej.iblogger.org/muscle_action_and_joint_activity_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367950/normal_5ff2146c89f16.pdfIn PDF document text
    • https://cdn.sqhk.co/kavonalitego/OhdK4je/rugby_world_cup_2020_dates.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/3374058001tvqzt.pdfIn PDF document text
    • https://cdn.sqhk.co/kazamepa/ghd8eij/50838949198.pdfIn PDF document text
    • http://bebolekuku.22web.org/sql_server_2017_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370785/normal_5fda2b1615892.pdfIn PDF document text
    • https://murafasonuralab.weebly.com/uploads/1/3/5/3/135398902/06da5a804983.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466386/normal_5fdd92687343f.pdfIn PDF document text
    • https://jawenovexexadu.weebly.com/uploads/1/3/4/0/134012785/zogemesoxisib_babewafugovile_wilipipe_fapifet.pdfIn PDF document text
    • https://zefopezonokav.weebly.com/uploads/1/3/1/3/131398054/vomip.pdfIn PDF document text
    • https://wabelurotetef.weebly.com/uploads/1/3/4/6/134693048/mokikasuxuxupeduxaga.pdfIn PDF document text
    • https://cdn.sqhk.co/pitewomepe/GgjicH9/car_crash_simulator_physics.pdfIn PDF document text
    • https://kibalenujodoziz.weebly.com/uploads/1/3/0/7/130776895/sepozaxezakabof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482854/normal_602140b8234d8.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/iejaO0C/33194841445.pdfIn PDF document text
    • https://devumevone.weebly.com/uploads/1/3/4/5/134589636/mabalo_rivisegezef.pdfIn PDF document text
    • http://gprofights.ru/19870004504anjm6.pdfIn PDF document text
    • https://cdn.sqhk.co/kososojog/PHvgdqP/billie_eilish_full_name_pronunciation.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://folijurojavagig.epizy.com/definitely_good_guide_2018.pdfIn PDF document text
    • http://lezogowoz.rf.gd/vofibagok.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_off00026c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26C3F 5300 bytes
SHA-256: 87eb91c0690918a4088664130b28858688b343428de4d8cc9f3ec75d07a0a812
font_01_sfnt_off00027e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27E27 12176 bytes
SHA-256: c1d547ac529684c122465330450109a4a6c6c318a97c89229a11acceffeafdec

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