Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9ff1752b8903dc…

MALICIOUS

PDF

86.7 KB Created: 2021-03-07 21:54:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: e75f9776d1f7964e57aabd06689db3ee SHA-1: 6c2795e9e89747f3e9d4ae059840550fcd8ed6a9 SHA-256: 2e9ff1752b8903dc352ae923aa58d705076561a80e40e9a8637782d65a9d2d1e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to a link farm hosted on disposable domains, a common tactic for phishing or distributing further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URLs suggest a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://leonvi.ru/strik?utm_term=como+resolver+integrales+definidas+online PDF link annotation
    • http://siondez.ru/lutofevagutawatusazalqtb4d.pdfIn PDF document text
    • http://zenajok.medianewsonline.com/10431349582.pdfIn PDF document text
    • https://cdn.sqhk.co/bexoninodag/GjiigcC/61878460551.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/dic4Gic/23266266000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373779/normal_600ddc0f7d84c.pdfIn PDF document text
    • https://cdn.sqhk.co/mijajijem/ticFiaD/soccer_modern_tactics.pdfIn PDF document text
    • http://vigikigopaloze.medianewsonline.com/jukitatojewivumilojuj.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/hp_officejet_6500_wireless_disassembly.pdfIn PDF document text
    • https://cdn.sqhk.co/bamopilu/5ggiijc/magnus_trainer_learn_train_chess_apk.pdfIn PDF document text
    • http://profer-opt.ru/linksys_re2000_setup_without_cd1d5z0.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/jdKzPjb/ludo_king_cheats_2020_ios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372967/normal_601d5cede82c0.pdfIn PDF document text
    • http://svoylend.xyz/83327062020lte9q.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/RQjbAgd/descargar_city_car_driving_2020_mediaf_re.pdfIn PDF document text
    • https://cdn.sqhk.co/kusewupudin/Lgijigw/31231190196.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419629/normal_5ff0456c23f33.pdfIn PDF document text
    • http://zakomuxoza.getenjoyment.net/rosuvafuxuk.pdfIn PDF document text
    • http://dunodipike.sportsontheweb.net/pendragon_book_1_summary.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/60174021103b2tnd.pdfIn PDF document text
    • http://pejokepi.mywebcommunity.org/36698521678.pdfIn PDF document text
    • https://cdn.sqhk.co/vovomafejuwa/cFejeYt/99777473090.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389394/normal_5fc609dd0ed93.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/me_before_you_full_movie_with_english_subtitles_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476420/normal_6008f17a91a06.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/bsAgcji/ice_hockey_pro_shop_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://manosotidokef.myartsonline.com/nipejumowiduzajizusadugiz.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D0 5192 bytes
SHA-256: 8704c9d211cacd6b21ae4899d3243be70e510ca76f8a92e3d2ecc1188b8736ce
font_01_sfnt_off00010b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B68 13008 bytes
SHA-256: 259e0e45dfd4efab7d5ff3cb01deac704011c8aa93fdb59b5b016bc16184b9b3
font_02_sfnt_off00013639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13639 16080 bytes
SHA-256: c0982807324681c2194e80f3f637ca3700f5bf2c32718b44bdc390b4bb628087