Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e3877cd04effd58…

MALICIOUS

PDF

81.7 KB Created: 2021-04-04 20:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 817414401292f3fd21325bfeb265b964 SHA-1: 0c08445d91718a0238b0f9afe354be1d9bc903f5 SHA-256: 6e3877cd04effd581c7618e7c329a272d406ba2821ce08194c9975a21f5a6501
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high heuristic score indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the PDF structure and URL patterns are indicative of a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=how+much+is+an+ab+lounger PDF link annotation
    • http://tevajevidiwa.22web.org/sowekizedorob.pdfIn PDF document text
    • https://cdn.sqhk.co/dewozoju/igggThf/agilent_function_generator_multisim.pdfIn PDF document text
    • http://kovamuwaropepu.getenjoyment.net/81259938201.pdfIn PDF document text
    • http://wagijap.22web.org/67333730710.pdfIn PDF document text
    • http://fuwijumazawad.mywebcommunity.org/jadupajuja.pdfIn PDF document text
    • https://cdn.sqhk.co/bipozipo/fDnmegi/hill_climb_racing_car_2_game_download.pdfIn PDF document text
    • http://rejawulomov.mywebcommunity.org/gizagivaw.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/iZjfiio/82207092883.pdfIn PDF document text
    • http://supusatode.sportsontheweb.net/easy_ways_to_get_money_in_cyberpunk_2077.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://voworugifajav.epizy.com/wabogagiletidixoduzafizid.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/angel_has_fallen_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/iracing_sprint_car_template.pdfIn PDF document text
    • http://vusukunuvedigup.epizy.com/32232596121.pdfIn PDF document text
    • http://zijedan.atwebpages.com/96468333275.pdfIn PDF document text
    • http://somasetowijo.myartsonline.com/4337059412.pdfIn PDF document text
    • http://sokinurerapim.rf.gd/83306383910.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/21119844062.pdfIn PDF document text
    • http://guseboses.atwebpages.com/kannada_calendar_october_2020.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA5 2952 bytes
SHA-256: d8b907802410e675ceca2784509e58a9dae2947c1b2ad43e3e0c02687eabed47
font_01_sfnt_off0000f633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF633 5408 bytes
SHA-256: a65fe6fadd493ea792b7f47fc5f4f7e3b421c25c4917afa051f2a956d90fb19d
font_02_sfnt_off00010874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10874 2660 bytes
SHA-256: 3576dd373b651515f47e23d31ed66261cdf4600bff3365b97b89943213537ffa
font_03_sfnt_off000113df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DF 10980 bytes
SHA-256: 24eadda64213c24cb1d7c0e718e2fefe6629ffbadc424c74802170b2a99dd328

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