Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef9bc61c8db74a6…

MALICIOUS

PDF

76.5 KB Created: 2021-03-13 22:18:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a8ec81b40ed5645b1a2cc43257d16ef7 SHA-1: a1b0e1481887b601b1684db03f91273264687551 SHA-256: eef9bc61c8db74a67541cfc3a8a991a29800398a3a8898fde60c542e16a6b01e
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to the 'Wim Hof breathing method'. No scripts were extracted, but the presence of multiple external URIs and the overall detection profile strongly indicate a phishing or malware distribution attempt.

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://druttle.ru/strik?utm_term=wim+hof+breathing+method+explained PDF link annotation
    • http://wejuzofibab.medianewsonline.com/40431197745.pdfIn PDF document text
    • https://punafatig.weebly.com/uploads/1/3/1/4/131408139/kepoxori.pdfIn PDF document text
    • https://xisedemagi.weebly.com/uploads/1/3/2/6/132681548/7795638.pdfIn PDF document text
    • http://palubofapejuraw.mywebcommunity.org/contrarian_investment_strategy.pdfIn PDF document text
    • http://kekijojovif.sportsontheweb.net/91317841213.pdfIn PDF document text
    • https://fumevido.weebly.com/uploads/1/3/0/8/130874276/310150.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/what_is_the_salary_of_electrical_engineer_in_pakistan.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/how_to_tell_the_difference_between_inkjet_and_laser_printers.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/how_to_cook_jasmine_rice_in_a_power_cooker.pdfIn PDF document text
    • https://gozawufi.weebly.com/uploads/1/3/1/3/131398332/8021688.pdfIn PDF document text
    • http://dapunajav.22web.org/how_to_send_garageband_file_to_email.pdfIn PDF document text
    • http://vifezitenof.getenjoyment.net/rugixosewoxebuv.pdfIn PDF document text
    • http://kasaxeko.mypressonline.com/vifota.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c30b87d5-e38e-4f4c-8f61-e356d9eaafe8.filesusr.com/ugd/347120_2ea4f564bb1b4ded8c17d1161833bb5b.pdf?index=trueIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_1678c32a2db043438454c513d4d48d5b.pdf?index=trueIn PDF document text
    • https://5d3a3edc-1384-4eb0-a354-174dd54c13aa.filesusr.com/ugd/7f5dc5_033217051bd24623b7cb85fbf46fd6d2.pdf?index=trueIn PDF document text
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_10c9ec51d259491ca358ed005fc3bc24.pdf?index=trueIn PDF document text
    • http://lekamidoku.epizy.com/what_does_a_tiger_represent.pdfIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_7766bb172d7f46feb5e79af9d5a94e21.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_off0000ebcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCC 5496 bytes
SHA-256: 7a0aa74c44e36f121da3fc3ff5ae4f3dbe35ec9cabad931551adc5ea1b60310c
font_01_sfnt_off0000fe64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE64 11244 bytes
SHA-256: 3e36f395b588030285f428b74dccd14cf49957e5c242fbe1c86ad2d109670d1a

Open this report in the interactive analyzer, or submit your own file for analysis.