Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27cde2f775aa474…

MALICIOUS

PDF

104.8 KB Created: 2020-12-31 05:12:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: feae41245c8478800d553885de26c9f1 SHA-1: 8323b710fb72bfaa14201ab262d10e61bb7c0b73 SHA-256: e27cde2f775aa4741f3dba2840838f9fb573affaf417fad489e8a5de319dfd43
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample is a PDF document flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content is designed to trick users into installing a browser extension or update. An external URI pointing to 'trafffi.ru' was extracted, which is likely part of the malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://trafffi.ru/123?utm_term=modern+blocky+paint+unblocked+videos PDF link annotation
    • https://cdn.sqhk.co/tuseliwi/ieieNiu/anyone_lived_in_a_pretty_how_town_poem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f88dbba0ce96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421330/normal_5fe7dea96d773.pdfIn PDF document text
    • https://cdn.sqhk.co/guzunilepin/iFt4jfy/41372552637.pdfIn PDF document text
    • https://cdn.sqhk.co/loboremetoxe/ghjgeie/stickman_downhill_mod_apk_revdl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449973/normal_5fd649595b037.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/30ee858b-ec30-47d9-8646-573a307ebd0a/josidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58385142-e273-44ac-b398-2405734bb9e8/59719762462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95aaebfb-34e6-41bb-b0d1-0dd9a9307614/survival_guide_for_empaths.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fb6112d-9b58-42d7-9b6c-81bc944852f5/jixozukatixinenet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bbc10a1-3307-403a-adf5-c701fcdabebc/83668064233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf47a9af-a3d9-4f47-a5dd-b38d707542fd/62327505001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a63a910b-1cf6-4f04-8be5-3530ad4573c9/xuvidegixanudomugulavoxun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5567b9a6-860f-48b1-83b0-bb90b6cf4759/7022616465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb59b916-850c-4974-8a86-ea2fa890e658/dragon_ball_z_dokkan_apkpure.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00017475.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17475 19588 bytes
SHA-256: ac5c4e09d88861765e8b6338b719facf88b8c421850d291b5a6cd1b677aa939c
font_00_sfnt_off0000f1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A8 19304 bytes
SHA-256: d1c744abc22d14a84971dda1dd61613dfed14948b5ca58b5e583990a66800f97
font_01_sfnt_off00012f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0E 5436 bytes
SHA-256: 6c983f791790bff8c33b2ee39c0cf605d06e930390188b5abda3d8640af7b5df
font_02_sfnt_off000141a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141A6 1700 bytes
SHA-256: b02219c2f91c831a244f607884f95f164ac00314c29f07e5d8a9d825551b2039
font_03_sfnt_off00014a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A26 13428 bytes
SHA-256: ff424d2f3689da12baf0aa7c5916c532e0ce08a181c1c41e26b5bdca33f0f198

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