Malicious PDF — malware analysis report

Static analysis result for SHA-256 13404e5aad19c35f…

MALICIOUS

PDF

83.8 KB Created: 2021-04-22 00:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e53d822a3aa751182712534bb230c9a SHA-1: e28e96b1fb20a19479c571f46b8d6d9c03b8d93b SHA-256: 13404e5aad19c35f6b5570c0b7d28dfc15cc92ad054ac173bf580d5538255ea8
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit user interaction to visit a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=what+is+dry+mode+on+lg+air+conditioner
    • https://cdn.sqhk.co/fojilude/ciaqhdu/last_one_standing_tvb_episode_21.pdf
    • https://cdn.sqhk.co/sesexibanobu/czlY7gh/30920964672.pdf
    • http://vibigobefe.22web.org/reporting_mann_whitney_u_test_in_text.pdf
    • http://gudituxubimof.22web.org/baby_bestiary_handbook.pdf
    • http://fawanajaxape.22web.org/legoranuguluvorow.pdf
    • https://cdn.sqhk.co/bikegola/hbHhi0R/ww2_battle_simulator_mod_apk_revdl.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/juwofuxufijup/71004036196.pdf
    • https://s3.amazonaws.com/towakog/ruudglas_pacemaker_water_heater_age.pdf
    • https://uploads.strikinglycdn.com/files/745b2683-a84d-48e8-a776-42dc459fde8e/78918871509.pdf
    • http://nuwenukaxoxigam.rf.gd/43892830882.pdf
    • https://uploads.strikinglycdn.com/files/3ec1557b-8d2c-4b44-a587-8704d16cec7b/9313910756.pdf
    • https://uploads.strikinglycdn.com/files/1ffd437e-adf8-435d-8eb3-89616ff04ab7/kukowilexikupebutok.pdf
    • https://uploads.strikinglycdn.com/files/29330c44-3bc6-486d-b456-15a6f7b61d09/head_first_java_2nd_edition_epub_download.pdf
    • https://uploads.strikinglycdn.com/files/2d9e73b2-9fd1-47bf-9ce4-0956d998a34e/segafababudikolitax.pdf
    • https://uploads.strikinglycdn.com/files/dc18b4d5-6f79-402a-b60e-3e38f50203f6/what_does_the_navy_seal_training_consist_of.pdf
    • https://uploads.strikinglycdn.com/files/d2010ba9-2999-42f9-b94e-cd1bfb4c4f34/can_a_samsung_s9_plus_screen_be_replaced.pdf
    • https://uploads.strikinglycdn.com/files/c3e1c3db-0d9d-4d12-96e6-4e998a84c867/2005_chevy_trailblazer_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/587a862e-3672-4609-99cb-cf1695cedec7/how_much_is_a_plastic_starbucks_cup.pdf
    • http://toxosimokumo.rf.gd/didirawexibanez.pdf
    • http://rexoxejaj.rf.gd/how_to_play_guitar_picking_patterns.pdf
    • https://uploads.strikinglycdn.com/files/c7c7d301-a9b5-4c5e-b0b8-50b3f006fd61/99787360913.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_off00010918.bin
0e6e00ca766432ad3677f05396e3c15ecb17f405d0f4ecf5951c3ab43bec810b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10918 5468 bytes
font_01_sfnt_off00011b99.bin
52fd97f47f0e7695c10c72cb3396078f91a06028b3871a62e016cf9bf4eb08dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B99 11132 bytes

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