Malicious PDF — malware analysis report

Static analysis result for SHA-256 726f70f0a731c940…

MALICIOUS

PDF

75.0 KB Created: 2021-03-02 16:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: bf9c5b1b1dd6bb79199147f33405d4fb SHA-1: b3291980520ac36572baaf26ce74d31194964461 SHA-256: 726f70f0a731c940cce3b63cb57f2b7acf7efa5ccaf7c81befb715f6ccad1384
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains numerous embedded URLs pointing to disposable hosting, characteristic of a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to exploit vulnerabilities or deliver further malicious content.

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://ponafet.ru/strik?utm_term=what+does+the+zone+of+proximal+development PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4458614/normal_5fee8062c4b5a.pdfIn PDF document text
    • https://lomimasexoguxi.weebly.com/uploads/1/3/4/7/134736135/titep.pdfIn PDF document text
    • https://pazarufawituxib.weebly.com/uploads/1/3/4/0/134000032/9568178.pdfIn PDF document text
    • http://donbetosstreettacos.com/slow_motion_video_software_freenu9lz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404733/normal_6037fe565cc90.pdfIn PDF document text
    • http://cmbmarketing.agency/currency_wars_song_hongbing_downloady9li7.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/travel_trac_comp_fluid_trainer_reviews.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375704/normal_5fca0940ea214.pdfIn PDF document text
    • https://risegexof.weebly.com/uploads/1/3/4/6/134661868/c291eb021.pdfIn PDF document text
    • http://help-business-media.com/vamoduv95nv.pdfIn PDF document text
    • http://bogavevi.22web.org/wafifa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473890/normal_603042f98fe5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485813/normal_602292509e79c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452624/normal_5fe9813cd854a.pdfIn PDF document text
    • http://burolona.22web.org/4634818590.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/can_you_download_inkscape_on_ipad.pdfIn PDF document text
    • http://badge-verification-center.com/how_to_be_a_doctor_in_spaink13zv.pdfIn PDF document text
    • https://mewasopaligesar.weebly.com/uploads/1/3/1/4/131454012/tufafivorapud.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/96476427168.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/muxawolufuwam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xekibedeba.rf.gd/beximubugile.pdfIn PDF document text
    • http://dowirefe.rf.gd/best_photo_editing_app_for_pc.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE842 5472 bytes
SHA-256: 4fb244c6cbd68202aa8bcc19f28717fbdabcdd961c902bbd3bdd5c5bb51550a7
font_01_sfnt_off0000fad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD4 10452 bytes
SHA-256: 2d8bda9124164788a4135a0d4c6664773c9a76dee7fa86e60c93c6639d9b3237

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