Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb1d2ef761da282…

MALICIOUS

PDF

82.1 KB Created: 2021-03-09 21:58:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f04cd89000d4bf167619abdae758322 SHA-1: 781b3596a5f5364151cf1b5ac3fad57ff5cd6f49 SHA-256: 3fb1d2ef761da2823de5bcffdc76b866f8a5a84deecea2e5fb9a0b89cb35c076
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and multiple other unknown URLs were extracted. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=que+es+movimiento+uniformemente+retardado+en+fisica
    • http://theporte.xyz/harder_than_you_think_gamen6gii.pdf
    • http://evatopshop.xyz/dugegonubomoducd31r.pdf
    • http://fitnesspack.net/love_story_movie_1970_trailervus7t.pdf
    • http://argo-tourism.com/46841388045ybbcb.pdf
    • http://zoomita.space/84334321001tju62.pdf
    • https://cdn.sqhk.co/sunidoxil/vhTh4hg/swipe_brick_breaker.pdf
    • https://cdn.sqhk.co/zamodozitip/hJqYKzO/blue_jays_radio_stream.pdf
    • http://daating19.site/11503703808fcjjn.pdf
    • http://xviiivbgz.com/380476433263gzlz.pdf
    • https://cdn.sqhk.co/pimupigedu/hd4fPpQ/amazing_grace_piano_sheet_music_free_advanced.pdf
    • http://chebsvet.ru/funoxizaremiwerozega1sxg.pdf
    • https://cdn.sqhk.co/lemusezilaz/hdm3ggk/posabavotikejifeguzi.pdf
    • http://itanah.space/nfl_network_dish_news7rfgf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a455804a-f2b0-4c96-bc63-0245aeb700ee/last_wish_raid_solo_guide.pdf
    • https://uploads.strikinglycdn.com/files/9490b164-7ca7-445e-8fdd-51097ea33048/gotepigowuredofox.pdf
    • https://uploads.strikinglycdn.com/files/d89bb601-9ec1-4f3b-b99f-b699576f4000/how_to_unlock_the_bolt_action_rifle_rdr2.pdf
    • https://uploads.strikinglycdn.com/files/64915b10-b204-418a-930e-a0fda07a3291/difference_of_two_squares_and_perfect_square_trinomial_worksheet.pdf
    • https://s3.amazonaws.com/semuxemakaw/9144006052.pdf
    • https://s3.amazonaws.com/zozuxukoxo/30278707693.pdf
    • https://s3.amazonaws.com/nemafu/2015_buick_verano_manual_transmission.pdf
    • https://s3.amazonaws.com/desekusoxi/bihar_board_matric_result_marksheet_2018.pdf
    • https://s3.amazonaws.com/mejifavo/boom_beach_mod_free.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e864.bin
1891cd042d6a52a2be4bbbc440225876873fc99618496c39cb21e268ff8f7f68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE864 5256 bytes
font_01_sfnt_off0000fa37.bin
0f89b4d38bbf4ee341799e366dc41032ef329d4411f1b5faf7a0daa99e53236b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA37 12420 bytes
font_02_sfnt_off00012313.bin
3a87a2a80cb0740ff7ad33dbd9b35031d90241dfccc5ab96a3d2c3133af9c3ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12313 16096 bytes

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