Malicious PDF — malware analysis report

Static analysis result for SHA-256 85165b4f96fdacf3…

MALICIOUS

PDF

72.5 KB Created: 2021-04-07 17:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09bde771f3b12309f08d58759a483a4c SHA-1: dc83052ce28b7340026e9366602a459b7a35325e SHA-256: 85165b4f96fdacf3185f62bb61102a4fe4c2a9b7e154a8218aab0cbacc9db203
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, and one specifically uses a 'utm_term' parameter suggesting a phishing or spam campaign. The presence of external URIs and link farm characteristics further supports a malicious purpose, likely to redirect users to a site for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://botokaw.ru/strik?utm_term=amor+y+respeto+emerson+eggerichs+pdf+gratis
    • https://static.s123-cdn-static.com/uploads/4407081/normal_5ff9e3764c380.pdf
    • http://noxavikadovul.mypressonline.com/glassware_calibration_procedure.pdf
    • https://static.s123-cdn-static.com/uploads/4446776/normal_5fcc901b36849.pdf
    • https://cdn.sqhk.co/gaxobenona/jc06bgg/jotanenek.pdf
    • http://fufejezonodim.mywebcommunity.org/dokaz.pdf
    • http://domodip.iblogger.org/52122557986.pdf
    • http://finipupote.mywebcommunity.org/15807295337.pdf
    • http://rubewox.sportsontheweb.net/67179218722.pdf
    • https://cdn-cms.f-static.net/uploads/4476930/normal_6052c922ec826.pdf
    • http://masuvanoleseg.iblogger.org/property_irregularity_report_american_airlines.pdf
    • https://cdn.sqhk.co/vafodagusun/eeIibeQ/bamexiwitinog.pdf
    • https://cdn-cms.f-static.net/uploads/4410431/normal_6064fe776422b.pdf
    • http://zizodoroluxonaf.sportsontheweb.net/how_to_determine_which_solvent_to_use_in_recrystallization.pdf
    • http://datovufes.scienceontheweb.net/soveroniji.pdf
    • https://cdn-cms.f-static.net/uploads/4485321/normal_606af1c37492a.pdf
    • http://sekujirimabasas.getenjoyment.net/48250279996.pdf
    • http://toxebugusopasur.22web.org/fopojugez.pdf
    • https://cdn.sqhk.co/lajefage/ahiJjdA/healthy_dessert_recipes_easy_to_make.pdf
    • http://lozuzaragujeb.mypressonline.com/92970761777.pdf
    • https://cdn.sqhk.co/firokizita/ijzjdQg/video_editor_app_for_pc_windows_7.pdf
    • https://cdn.sqhk.co/lenufetimop/gbggyPn/her_smell_parents_guide.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://99516632-72ce-40f3-a9a1-a01c91361c65.filesusr.com/ugd/e42c35_6378965a6f784ac5b7ea24472b59b9f8.pdf?index=true
    • https://c4a5d104-04f9-44e6-b03f-1f5edac3680f.filesusr.com/ugd/f23921_0e6f526c1ed14178b9142fd9db86ab93.pdf?index=true
    • https://e02212b7-c8ec-4bf5-ba3e-d68a1de675e0.filesusr.com/ugd/7f1d73_4a142b55ac244d46a6a2b99670d17715.pdf?index=true
    • https://d926c97b-7f3b-4ec8-a52a-318bcb589338.filesusr.com/ugd/120f26_369840e29c94470c8d54d10d1a854a3d.pdf?index=true
    • https://b1fdf235-84a1-4479-ba44-7fc4a4f983d7.filesusr.com/ugd/afcd87_d579476ab3ae4fa6b2a1eb4e6dde5bc6.pdf?index=true
    • http://wavepenaxega.epizy.com/zejitaxaporola.pdf
    • http://doxokalisawe.myartsonline.com/83370932591.pdf
    • http://jozobudesurarab.onlinewebshop.net/32010158600.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db00.bin
803c399f9228190d9b98e5cd324f2a383f4b327026583f8123240931948724b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB00 5628 bytes
font_01_sfnt_off0000ee13.bin
3335346f779e1b423d91d4f24e810341ec2895621be852a10cc0a7d3467dd657		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE13 11732 bytes

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