Malicious PDF — malware analysis report

Static analysis result for SHA-256 c38f49acddbd3779…

MALICIOUS

PDF

88.6 KB Created: 2021-04-07 16:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ccd4ae20baa775f04b52df0fbb6f7ffe SHA-1: 9094b55f02403e4e4fc105ce032f257d34ef8c9c SHA-256: c38f49acddbd377906416500202a9f5b4d0b77721bb741fcc5d99d15cbae7ba8
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a link farm with numerous external URLs, suggesting an effort to redirect users to potentially harmful sites. The document body, though heavily obfuscated, contains text related to movie search terms, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/strik?utm_term=watch+helter+skelter+movie+1976+online+free PDF link annotation
    • https://cdn.sqhk.co/seworani/jihegh0/99180602245.pdfIn PDF document text
    • https://cdn.sqhk.co/xovepejegosi/1shfdM6/draughtsmanship_definition_synonyms.pdfIn PDF document text
    • http://fanilobepewe.sportsontheweb.net/tracheostomy_types.pdfIn PDF document text
    • https://fitetavixanara.weebly.com/uploads/1/3/4/7/134721375/xaworevavedib.pdfIn PDF document text
    • http://zolozabaxozafa.iblogger.org/angielski_swka_tematyczne.pdfIn PDF document text
    • https://cdn.sqhk.co/fogobewataja/B3hekyo/76145603665.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/g7jfxZH/how_to_get_free_beauty_products_to_review.pdfIn PDF document text
    • https://cdn.sqhk.co/wojinagimepu/iipjfhb/ultra_balloon_game_free_for_pc.pdfIn PDF document text
    • https://suvoneretalepa.weebly.com/uploads/1/3/5/2/135299969/5142800.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/ohejfih/skyrock_radio_libre_septembre_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/jhoibIO/idle_tycoon_space_company_wiki.pdfIn PDF document text
    • http://getubij.66ghz.com/85570059929.pdfIn PDF document text
    • https://cdn.sqhk.co/tedigedubemi/heENBhe/word_jumble_maker_printable.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_21b609e82e234bd281d5a21182539638.pdf?index=trueIn PDF document text
    • http://pigutun.myartsonline.com/95311720611.pdfIn PDF document text
    • https://1347de4c-4e54-429a-b84c-372e60bc5a2b.filesusr.com/ugd/6c98bc_1faf989bfbec4e01b3a699965146239c.pdf?index=trueIn PDF document text
    • http://ginowane.onlinewebshop.net/besukojokilitobu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA6 5700 bytes
SHA-256: 80250c52101f663742499f5d75ba92fb3d3913712dea59aee24cda7d7a226f3f
font_01_sfnt_off000130f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F4 10684 bytes
SHA-256: 0d5e1b91b5b29605ca17aa1eb4bc7ca36c2499b387da4936b1428ca4930d77c4

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