Malicious PDF — malware analysis report

Static analysis result for SHA-256 775c273fe40fd9ab…

MALICIOUS

PDF

95.4 KB Created: 2021-03-09 09:53:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a80f66c60ff155f33bc67c6187db5a7a SHA-1: b7d738b1d783b9623d99d9a2211015147af92241 SHA-256: 775c273fe40fd9ab28905842037421877a62eb7541931cab4677f76cc40070c3
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body mentions "Gta 5 cheats ps4 guns", which is a common lure to attract users to click on the embedded malicious links.

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://maypoin.ru/wix?keyword=gta+5+cheats+ps4+guns
    • http://virona.org/monowobonuzedyaiis.pdf
    • http://pozijuza.scienceontheweb.net/48300005953.pdf
    • http://mscgis.net/how_do_i_print_multiple_labels_on_p_touch0veag.pdf
    • http://reactivaperu-viabcpi.com/does_comcast_charge_for_cable_boxp84oz.pdf
    • http://finoginujowiwi.mypressonline.com/oster_golden_a5_two_speed_clipper_review.pdf
    • http://citruss.space/acrylic_sheets_suppliers_in_kenyahjxze.pdf
    • http://xilagima.66ghz.com/kozanetovigalozano.pdf
    • http://xokebidukefu.getenjoyment.net/zijuguxuwotowubalow.pdf
    • https://cdn.sqhk.co/suxavawudomo/0gjEr33/ecruteak_city_gym_crystal_walkthrough.pdf
    • http://guzoseta.getenjoyment.net/tifepoxe.pdf
    • http://power-guard.shop/turtle_beach_px4_manualzg4ou.pdf
    • http://reduslimitalia.site/matchbox_premiere_collection_price_guidebmtoq.pdf
    • http://collegegraduatecentraldating.com/blade_and_soul1eqjt.pdf
    • http://esclub.pro/microsoft_powerpoint_project_roadmap_templatebsp12.pdf
    • https://cdn.sqhk.co/fapolokid/ijfYRMG/sudozixugo.pdf
    • https://cdn.sqhk.co/jefapukawore/XTidX9y/51435030143.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wofajigu.rf.gd/horde_hunter_leveling_guide_classic.pdf
    • http://jopuzasoxu.rf.gd/cuales_son_los_derechos_humanos_definicion_para_nios.pdf
    • http://xitutudatiri.epizy.com/pawimi.pdf
    • http://gebusibe.rf.gd/yamaha_ypg-535_88-key_portable_keyboard.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f61.bin
b247c99ab6fed5872a9b8141c0ef76fe47089e77af7743acb25ee258af04e21d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F61 5312 bytes
font_01_sfnt_off00014180.bin
e2b2bf70e8b6b4a54ece58229035fd791d48a72254e7563ad3ad15eb9e33aa29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14180 15312 bytes

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