Malicious PDF — malware analysis report

Static analysis result for SHA-256 265e095240211a78…

MALICIOUS

PDF

81.8 KB Created: 2021-03-04 23:52:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 192bf3ffb80b9fe832a4d9e6907efaa3 SHA-1: 2b8d3ee6483b5e18d2fa955dbd7219f683ef3698 SHA-256: 265e095240211a782b412c4d2e6b09d67938c1076f0b8eb4b28c9030cf520bbc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The sample is a PDF document identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/strik?utm_term=tokyo+ghoul+re+kaneki+and+touka+love+scene+manga PDF link annotation
    • http://wide-take.top/4568709090510la7.pdfIn PDF document text
    • http://strapslap.online/fuzixosorenariviluxubr7a9.pdfIn PDF document text
    • http://bloomwithdeanna.com/dumifo5gy6h.pdfIn PDF document text
    • http://getfreecreditreport.info/2730679779540jp6.pdfIn PDF document text
    • https://cdn.sqhk.co/bipokagiti/jbKR0gc/idle_pocket_crafter_mine_rush_hack.pdfIn PDF document text
    • http://olymptrade.buzz/dragon_sword_castle_crashersqcris.pdfIn PDF document text
    • http://wwbook.org/2021_ford_mustang_mach-e_select_hpuy4tm.pdfIn PDF document text
    • https://najijufo.weebly.com/uploads/1/3/4/7/134714833/d7340b10b5.pdfIn PDF document text
    • https://cdn.sqhk.co/powurejur/piaWkF6/history_of_cuban_sandwich.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/T2AhaOU/planet_fitness_black_card_perks.pdfIn PDF document text
    • http://trickyturkey.com/bankers_adda_english_vocabularyrhp0t.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/acr_full_formx3f4n.pdfIn PDF document text
    • http://help-copyrighteamservice.com/xogunodixayo37k.pdfIn PDF document text
    • http://thedouche.xyz/92825442318z8lyw.pdfIn PDF document text
    • http://classkaod.ru/simple_notepad_camera5fl7y.pdfIn PDF document text
    • http://onlinekartiadesi.com/27221280468mxl0l.pdfIn PDF document text
    • http://familyit.info/odia_new_movie_full_video_songgmrtv.pdfIn PDF document text
    • https://cdn.sqhk.co/fovomesit/akQhehd/dollar_general_store_application_online.pdfIn PDF document text
    • https://wizitizisib.weebly.com/uploads/1/3/4/3/134361222/xidunurutatebi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d15d76-1fc0-455c-a519-3577f16fa944/best_fake_tan_for_sensitive_skin_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de0f9686-45b5-4b53-8d00-af25679a9ef6/42828267541.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34b5f9c4-d1c0-4b89-b2cd-3566f6bf2048/29572143346.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68f81792-1a62-46b0-a9db-de60fa9b2f5c/207952756.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_off0000ea3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3C 5528 bytes
SHA-256: af2daac6ca3349b03bdca0a40280925f3b8f4bfde601825bd3d14377ab0973f4
font_01_sfnt_off0000fcf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF3 10868 bytes
SHA-256: b7e6e88b358399abeaa586ab1759948a6b36547f0cc8ac16a3f47515c12256c4
font_02_sfnt_off0001222f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222F 16568 bytes
SHA-256: 9c8610718a46fd2126833cd846b1f9784286f3b5492c0a264cef27dd35cc4e0f