Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffe310bee377d899…

MALICIOUS

PDF

79.3 KB Created: 2021-03-18 01:07:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 0bd9ae87e08c7e5990b92251375aa97a SHA-1: 50aa72991f412b3c5a8d8179c81eb6acdb84c780 SHA-256: ffe310bee377d8990a0b92392ea76922078378f5919bd2362e1ad69a99574f3a
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, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating numerous links on disposable hosting, suggesting an attempt to obscure malicious activity or distribute payloads. The presence of external URIs and the overall structure strongly suggest this document is a lure for phishing or malware delivery.

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://resalured.ru/wix?keyword=drive+right+chapter+7+test+answers PDF link annotation
    • https://cdn.sqhk.co/vakolitakap/LicwRhe/3075858356.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490738/normal_604d2fb50c902.pdfIn PDF document text
    • http://znasila.ru/doom_patrol_trailer_season_15u0x8.pdfIn PDF document text
    • http://vashobereg.com/7180582005546gy0.pdfIn PDF document text
    • http://piwofoterif.sportsontheweb.net/58153745570.pdfIn PDF document text
    • https://cdn.sqhk.co/leguzufaju/BjhjfJK/guess_the_movie_quote_disney.pdfIn PDF document text
    • http://copyrightshelpcenter.com/livestock_improvementnfj4w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379474/normal_5fd2c08d58384.pdfIn PDF document text
    • http://migerov.xyz/artcam_wood_carving_designs_freekjmcz.pdfIn PDF document text
    • http://idealica-columbia.site/how_to_tie_leather_cord_jewelry8vvim.pdfIn PDF document text
    • http://pc-remont.website/new_naats_2019_audiox0uso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486535/normal_5fca70a0bb420.pdfIn PDF document text
    • https://cdn.sqhk.co/jekefebiba/4hevnhj/wawiwoda.pdfIn PDF document text
    • http://natorg.fun/how_to_scan_using_canon_mp250p6agn.pdfIn PDF document text
    • http://edaruzal.xyz/bakery_business_plansqj5yb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482027/normal_5fc9f994f093c.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/support.nintendo.com_error_code_23400xhftq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rivubutapadagar.epizy.com/81247029760.pdfIn PDF document text
    • http://voresabuso.rf.gd/kazazakovebuweva.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/asm_metal_handbook_volume_9.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_off0000fac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC8 5396 bytes
SHA-256: a6d21163e93cfa18cd5228e55bded37498c4230da08d63b27b9e1f10483ca44b
font_01_sfnt_off00010d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D46 10188 bytes
SHA-256: 644b87d00fc0af9e10cd36fb7469f8c139c27683bcd089aabb5c1e72bd436f35

Open this report in the interactive analyzer, or submit your own file for analysis.