Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f12e94b87366f2…

MALICIOUS

PDF

68.9 KB Created: 2021-04-19 23:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9840fa608ef45569e4b546668267d5d SHA-1: 768145f176f8f1838ae36a99de2aacbb87db7df1 SHA-256: 04f12e94b87366f2b915a153501fbbbbeebb3289aeb01734f5f73031555f69fa
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URL is presented as a free download, which is a common social engineering tactic.

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://resalured.ru/strik?utm_term=interpersonal+communication+kory+floyd+free+download
    • https://static.s123-cdn-static.com/uploads/4388062/normal_6008f18ab6e2b.pdf
    • https://cdn-cms.f-static.net/uploads/4427300/normal_5fd7b56d32ef6.pdf
    • http://kegujusotuk.iblogger.org/rebupuguremimazi.pdf
    • https://cdn-cms.f-static.net/uploads/4447662/normal_6044caf937ba3.pdf
    • http://lesagotefawa.22web.org/5_practices_for_orchestrating_productive_mathematics_discussions.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/724bed33-a673-4f03-8556-dcc1eedd64af/death_note_2015_movie_trailer_reaction.pdf
    • http://sexotuwido.rf.gd/general_computer_knowledge_questions_and_answers.pdf
    • http://tinafominur.epizy.com/what_should_your_child_know_by_18_months.pdf
    • http://dowovefedomo.epizy.com/buzzed_drinking_game_cards.pdf
    • https://s3.amazonaws.com/lofese/9424033205.pdf
    • http://wiribuxumuw.rf.gd/bypass_road_movie_pagalworld.pdf
    • https://s3.amazonaws.com/genedesowul/tonopabemitoxuvapoduvo.pdf
    • https://uploads.strikinglycdn.com/files/a18eb527-a57a-47ef-b6fe-45a93960eaec/72629304893.pdf
    • https://s3.amazonaws.com/mexesazaxasa/tesopelovoropevemagi.pdf
    • https://354df738-7a8c-4643-bdcd-aa58f7c4bd0c.filesusr.com/ugd/69cf62_97aa175e11cf4a0881e32b1e52900aa1.pdf?index=true
    • https://246406bc-bb0d-4f29-baed-d8a6153a9543.filesusr.com/ugd/3ddeef_5e1a0e3e19504313ad2fd7db812377de.pdf?index=true
    • https://s3.amazonaws.com/mogedozara/5334035952.pdf
    • http://diwuvugu.epizy.com/xekelelobamamebi.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_off0000cf1a.bin
958199d4a38b716ed84373912b2b3f412cf2b1de97f50759bb17dd6c2cc423c9
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1A 5496 bytes
font_01_sfnt_off0000e1ce.bin
3af9629bfe1debaf60ec28d8456701abd7e9aabfaf1f1d34cd97f55726df735d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CE 10780 bytes