Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f144d2245b1286f…

MALICIOUS

PDF

94.3 KB Created: 2021-03-08 15:13:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 48d3ffd034944828f019d1549a40789a SHA-1: 6f7a1822c9d6ec67f2ac96797c48b1d4bce4e1aa SHA-256: 5f144d2245b1286f128c8073cbd832bb45168fb4962e5d6536fff68586f410db
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to a common search query, designed to trick users into clicking 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://xezojetit.ru/strik?utm_term=what+is+the+oldest+story+in+the+bible PDF link annotation
    • http://dololebajug.scienceontheweb.net/paliz.pdfIn PDF document text
    • http://roboludawu.mywebcommunity.org/water_pollution_essay.pdfIn PDF document text
    • http://specialsale.info/is_a_12_ft_trampoline_big_enough50lcf.pdfIn PDF document text
    • https://gojufoviwovefu.weebly.com/uploads/1/3/4/5/134515133/2419358.pdfIn PDF document text
    • https://witabavuwimob.weebly.com/uploads/1/3/4/3/134339013/meluwoberovis.pdfIn PDF document text
    • http://rovanenafet.getenjoyment.net/apnea_del_sueo_en_adultos_mayores.pdfIn PDF document text
    • http://renijulemigato.iblogger.org/68929030102.pdfIn PDF document text
    • http://autokenn.com/toolbox_talks_construction_ontario8wuct.pdfIn PDF document text
    • http://life50it.pro/6350579111fftt6.pdfIn PDF document text
    • http://fexufivuxo.22web.org/kaparakig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_0d9e1f585a42404782da468517407d45.pdf?index=trueIn PDF document text
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_f558f949e7f94499828f63fd0f9cacaa.pdf?index=trueIn PDF document text
    • http://lisevazoni.rf.gd/mobile_number_location_tracker_app_apk.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/kotor_guide_korriban.pdfIn PDF document text
    • http://fazejilijir.epizy.com/cast_and_crew_of_maze_runner_scorch_trials.pdfIn PDF document text
    • http://dejudunobagozut.epizy.com/what_are_the_functions_of_social_workers_in_the_community_development.pdfIn PDF document text
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_74b83e12278e4cb48e423f6103b1e966.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000134bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134BB 5168 bytes
SHA-256: 9c6743b677a6df2f1e4377dcbb156df7b83e17f463c53033a879e0edcc2ab070
font_01_sfnt_off00014654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14654 11408 bytes
SHA-256: 6dc230501cbb8a76d0de35831756545ce8d1d8b8f09fe100257de7f657bafd17

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