Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac19d9203f7c742e…

MALICIOUS

PDF

74.4 KB Created: 2021-03-18 19:48:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72e4a0924c1001186d2060c035c2ca98 SHA-1: 485b8c14ab2eac9a5e14d96d776accf56f31d406 SHA-256: ac19d9203f7c742eed8b07891f60d22f3649347c73a1f33c5a7d9917dfdefa07
96 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing attempt. The embedded URL, 'https://pelibifir.ru/award?keyword=tax+audit+report+format+for+ay+2020+19+pdf', is likely used to deliver a secondary payload or redirect the user to a phishing site. Although no scripts were explicitly extracted, the PDF structure and the nature of the URL suggest an attempt to exploit user trust by masquerading as a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/award?keyword=tax+audit+report+format+for+ay+2020+19+pdf
    • http://fozakewugumomig.22web.org/aprender_em_comunidade.pdf
    • https://cdn.sqhk.co/bivuwusim/DjgViik/45933491777.pdf
    • https://cdn.sqhk.co/vemetafije/tKcgghg/tomum.pdf
    • http://xoriruviridov.22web.org/monster_hunter_movie_music.pdf
    • http://fewemika.66ghz.com/zafagowez.pdf
    • http://gamuxiwami.getenjoyment.net/asana_pranayama_mudra_bandha_portugues.pdf
    • https://cdn.sqhk.co/gisusisabez/tgiUFvC/aafat_naezy_song_pagalworld.pdf
    • http://gikikobudip.22web.org/bulats_practice_exercises.pdf
    • http://mujizitodosi.22web.org/how_much_does_a_beginner_blogger_earn.pdf
    • http://sakepugikunon.mypressonline.com/remipopufimoralu.pdf
    • http://waliduv.mypressonline.com/how_to_log_into_my_old_facebook_account.pdf
    • http://brumbum6.xyz/battery_doctor_pro_apkvhshz.pdf
    • http://ita-yog.space/51446062516rvpq9.pdf
    • http://lokotahas.ru/mitutapavoragewoligbg9g.pdf
    • https://cdn.sqhk.co/daposofoxig/dihgp6x/mountain_bike_helmets_for_sale_cape_town.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vipuzot.rf.gd/nigujifedajurikedufolusox.pdf
    • http://gonefuxirazu.rf.gd/jingle_bells_sheet._music.pdf
    • http://xelipiwaf.epizy.com/30395022985.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_off0000e240.bin
a62acef850f0c847d52518ecd65d61643494720d0b72e83133d07cb721cf6f16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE240 5580 bytes
font_01_sfnt_off0000f53d.bin
1a23c54b82ad502b5dafeaddbed00f30b3689a8ead9339a88b2e2c336554c603		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF53D 11436 bytes

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