Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf149513d06a27c…

MALICIOUS

PDF

87.3 KB Created: 2021-03-03 15:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 37971ffec53cda49d1f9a98597007f5e SHA-1: d80bf2476d6f40c2c4a08b9381c9697ca60412bc SHA-256: ccf149513d06a27c59f152dfa4caeb8daaf9bfaf7abb07d2175402da2a2636c1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users. ClamAV and ML classifiers flagged this as malicious, specifically a phishing trojan. The presence of embedded URLs suggests an attempt to direct users to malicious sites, likely for phishing or to download further payloads.

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://leonvi.ru/award?keyword=jvc+digital+video+camera+gr-d250u+charger PDF link annotation
    • http://lobabinuladeri.medianewsonline.com/64906471435.pdfIn PDF document text
    • http://xonejalevesezom.sportsontheweb.net/70378698957.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/first_alert_carbon_monoxide_alarm_no_battery_replacement.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/how_do_you_share_a_video_on_facebook_story.pdfIn PDF document text
    • https://vefajuvajodal.weebly.com/uploads/1/3/6/0/136094574/3548934.pdfIn PDF document text
    • http://jiteruruw.sportsontheweb.net/fodirepa.pdfIn PDF document text
    • https://bagobizofenagex.weebly.com/uploads/1/3/4/7/134767931/mopufu.pdfIn PDF document text
    • https://fazokovonopa.weebly.com/uploads/1/3/5/3/135329702/rimag.pdfIn PDF document text
    • http://gixipures.sportsontheweb.net/tuzewabokojojedabisaxuxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://padusij.onlinewebshop.net/mejomepuropawejomadefaku.pdfIn PDF document text
    • http://vorasatijede.rf.gd/50306561655.pdfIn PDF document text
    • http://likutolejit.onlinewebshop.net/cfa_level_1_salary_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/what_does_the_term_broad_statement_mean_num1_num2__get_num.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_off00011811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11811 5652 bytes
SHA-256: 583763c16b68c6e16a55bc12f9666ad65b124f23bd058e04b665fad8151c3f6d
font_01_sfnt_off00012b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B2E 10780 bytes
SHA-256: 4f5e1a02427297f74aadc3f606154eeac18788d16e08a19d556ef4030c509cf7

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