Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7dcd203d0bf7585…

MALICIOUS

PDF

81.5 KB Created: 2021-02-27 03:27:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 93b0fa4dd9117b7b1e514f5152175e8f SHA-1: 92f17cf6c85f7b1bcbc59e43a4c401be796e328b SHA-256: f7dcd203d0bf75854d9f854fc5c654d99026bee08be924a0c0f14313daa348b7
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 0.9998

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/123?utm_term=el+pollo+loco+chicken+black+bean+bowl+nutrition PDF link annotation
    • http://cybety.xyz/free_download_dirt_xtreme_mod_apk3za6p.pdfIn PDF document text
    • http://menformula.xyz/500217735344kgbc.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/dropwizard_metrics_consolereporter06k22.pdfIn PDF document text
    • http://misstourist.info/439676785761d0p1.pdfIn PDF document text
    • https://cdn.sqhk.co/rebamomidaw/RsN1ygf/10811057724.pdfIn PDF document text
    • http://2020coupons.info/63598811732wnq0y.pdfIn PDF document text
    • http://life-news.tech/43277322650ofy4s.pdfIn PDF document text
    • http://qupieasy.online/lisosaparemefegt1h2o.pdfIn PDF document text
    • http://citrus-fruit.space/bejunumofadipekosamup3kbzj.pdfIn PDF document text
    • http://nigasheff.xyz/paxerinagukadi8n7kz.pdfIn PDF document text
    • https://cdn.sqhk.co/sinemajud/heghNib/cruise_critic_roll_call_crown_princess.pdfIn PDF document text
    • https://cdn.sqhk.co/fekesolip/60Ajcgh/tazajomov.pdfIn PDF document text
    • http://pixell.store/dennis_kelly_after_the_endm7hf4.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/ARF9Cge/ludo_club_fun_dice_game_mod_apk.pdfIn PDF document text
    • http://sportita.fun/oneplus_nord_gadgets_360_ratingpyuk5.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/igggheQ/8552729846.pdfIn PDF document text
    • http://mon-cmb.best/tetoxtqiao.pdfIn PDF document text
    • http://form-copyrightservices.com/34235232665n6x3s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/degagaziv/jeepers_creepers_3_full_movie_hd.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_off000103de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DE 5096 bytes
SHA-256: 1b43f71bee3d217c5902b71669653bdd54d484caabbe0d34f709930cc1ae959d
font_01_sfnt_off0001153e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153E 10224 bytes
SHA-256: 8ca2e6d2ad861cd7a2776f30131ac640d5987810093f91f01b4d9a74c8806f67