Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c694ae47e4f3a2e…

MALICIOUS

PDF

75.5 KB Created: 2021-02-15 20:40:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 55ee9764e61604a923a57b45e53d9217 SHA-1: 086ab0acc3a048dee2200841c89fc5e7919000ac SHA-256: 9c694ae47e4f3a2e5960356fe2d6b8c34d808ec9e733d7288899093dbad1a52d
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document employs a social engineering tactic, presenting a lure for users to install a browser extension or update. This is a common method to deliver malware or steal credentials. The presence of numerous external URLs, including those hosted on disposable domains and link farms, further supports a malicious intent, likely to redirect users to exploit kits or phishing pages. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://bologen.ru/123?utm_term=netgear+cg3000d+user+manual PDF link annotation
    • https://cdn.sqhk.co/jemajujo/ijzUIhj/vokaji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381294/normal_5fd1910dd80b5.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/hCuEjan/jabirinirupozexi.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/giqc5LH/islamnagar_budaun_news.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/Fie1hbL/kawerukasuwunozuxibitala.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/bbz9dic/super_truck_racer_wii.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/h1ohjut/meteor_shower_calendar_for_2020.pdfIn PDF document text
    • http://xawikeroteguvu.iblogger.org/fundamentals_of_management_8th_edition_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/sozedikepasu/gehejy2/police_car_chase_cop_simulator_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/RhgXddP/wallpapers_for_samsung_a11.pdfIn PDF document text
    • http://padazaj.iblogger.org/ffx_2_blitzball_training_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388421/normal_5fd96a775215d.pdfIn PDF document text
    • http://bokubewere.22web.org/bed_admission_form_2019_maharashtra.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nisarinu.epizy.com/35453716180.pdfIn PDF document text
    • http://kababotatage.epizy.com/chrome_windows_8._1_32_bit.pdfIn PDF document text
    • http://xuxusemo.epizy.com/luwomagedinipepafenupugej.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/hiking_backpack_buying_guide.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_off0000e99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99A 5536 bytes
SHA-256: e656687d379df3be61cdac71edcce49847ad7ef26f3589d7465a76e54fac3c4f
font_01_sfnt_off0000fc56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC56 10852 bytes
SHA-256: ea7e5d4b18c748e48299907113449650468fa60dc707cd9e5e1cc0a4f146e347

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