Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6678c20671170a…

MALICIOUS

PDF

85.1 KB Created: 2021-06-01 13:46:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e30209f94f5cd1103c54f6587ad92b5a SHA-1: ad11b0b8f7450ea16901d3d79ebcf15836160d97 SHA-256: ab6678c20671170a27c874556e4f168cba3063cf12d4bb3cab710735b7c55080
136 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it uses a social-engineering lure to trick users into installing a browser extension or update. The embedded URL, https://ponafet.ru/123?utm_term=xeplayer+android+emulator+free++for+pc, likely serves as a redirect to a malicious site or download. No scripts were extracted, but the overall pattern suggests a phishing attempt designed to lead to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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/123?utm_term=xeplayer+android+emulator+free++for+pc
    • https://cdn-cms.f-static.net/uploads/4412382/normal_606e69cc95919.pdf
    • https://cdn-cms.f-static.net/uploads/4393772/normal_5fda4e5539d0f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/b3650f67-391c-4d3a-9c47-bfbccd5bbb25/maytag_quiet_series_200_installation_manual.pdf
    • https://uploads.strikinglycdn.com/files/1d83d1b2-9513-415d-8a81-ab6ded121c2b/85513947536.pdf
    • https://uploads.strikinglycdn.com/files/b2d1973c-e1e2-43f9-aa98-3460e9202ff8/18960937360.pdf
    • https://uploads.strikinglycdn.com/files/cb76c813-770e-4b6d-aa08-32a145229ee7/lunufibesatekon.pdf
    • https://uploads.strikinglycdn.com/files/23f748c1-4341-4868-9fd4-8ee3f8541244/67571206969.pdf
    • https://uploads.strikinglycdn.com/files/d3f1e24c-5454-45d7-8aa1-6b9f22eef584/how_many_times_brighter_is_betelgeuse_than_the_sun.pdf
    • http://betosaxugawi.pbworks.com/f/jebutidufavasemuw.pdf
    • https://uploads.strikinglycdn.com/files/7aabbf54-edf7-4894-a8b8-1dcea3b324cc/34353236683.pdf
    • https://uploads.strikinglycdn.com/files/79bd9a30-932e-4ca8-80f0-7657c6d565dc/78834139318.pdf
    • https://uploads.strikinglycdn.com/files/333f09b3-7c9b-46b6-ba91-8263ab9cac4a/fender_fsr_hot_rod_deluxe_iv_a-type_lacquered_tweed.pdf
    • https://uploads.strikinglycdn.com/files/d326f88e-c39e-48df-9860-aab6fa9b2a28/50147030647.pdf
    • http://pugaxigodaka.pbworks.com/f/35481223291.pdf
    • http://viluxese.pbworks.com/w/file/fetch/144428790/how_to_fix_hamilton_beach_flexbrew_leaking_water.pdf
    • http://xalomuzavege.pbworks.com/w/file/fetch/144458931/kpss_lisans_2020_trke_deneme.pdf
    • https://uploads.strikinglycdn.com/files/5446b6dc-e3b1-46c8-99e7-d11299a323cd/84975971659.pdf
    • https://uploads.strikinglycdn.com/files/21d3525d-b8ed-44d0-a170-0898913a31b7/jump_force_ps4_price_ph.pdf
    • https://uploads.strikinglycdn.com/files/8c0d2140-1049-494a-a126-9a11103c2771/21878104497.pdf
    • http://tejudafo.pbworks.com/w/file/fetch/144445911/13373130112.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010281.bin
bf1081425c90572cccf59a0a6264422a5b09eae89404076c0d76ff3f092824e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10281 5084 bytes
font_01_sfnt_off000113b3.bin
91cbb42a2a1902445134829f6899e8253046c940a637ccdc61a31f6409d8f6ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113B3 11000 bytes
font_02_sfnt_off000138eb.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138EB 4324 bytes

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