Malicious PDF — malware analysis report

Static analysis result for SHA-256 3974bf697a1f9912…

MALICIOUS

PDF

74.9 KB Created: 2021-05-18 22:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db6699590d6a6ee8bc796710722cf6ac SHA-1: bea4b88f88fe6c574c681d363416cc3005490c85 SHA-256: 3974bf697a1f99128ed3f9eae11fb5e69d25289bb9f609acc23f757d9fb88152
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 purposes. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to exploit users by presenting a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/strik?utm_term=ficha+descriptiva+preescolar+2019
    • http://zibujedi.iblogger.org/latest_google_play_services_android_studio.pdf
    • http://voninizi.iblogger.org/marvel_contest_of_champions_forum_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4475216/normal_5fd1ac3c48b53.pdf
    • https://static.s123-cdn-static.com/uploads/4474987/normal_5fff5f5aa96a0.pdf
    • https://static.s123-cdn-static.com/uploads/4490918/normal_5ff9d795abe96.pdf
    • https://static.s123-cdn-static.com/uploads/4465548/normal_60090b54ca48b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tosefiwaniw.rf.gd/bixufitibomefakaliviko.pdf
    • https://s3.amazonaws.com/pibajuwi/26308413464.pdf
    • https://s3.amazonaws.com/xakusineba/tecumseh_diaphragm_carburetor_rebuild_kit.pdf
    • https://uploads.strikinglycdn.com/files/271de236-e1a5-41cf-86fd-3b043e915aba/91404604717.pdf
    • https://s3.amazonaws.com/werowibovezoje/whirlpool_washing_machine_repair_centre.pdf
    • https://s3.amazonaws.com/risisipajole/xusovumonigatefifuzepifut.pdf
    • https://uploads.strikinglycdn.com/files/62edea85-c76d-42a5-a86e-3914e90291f8/cisco_multicast_issues.pdf
    • https://s3.amazonaws.com/rubidokezive/77036177629.pdf
    • https://uploads.strikinglycdn.com/files/157beedf-7caa-4998-8db7-47d55ab4451c/zakosozogusiminu.pdf
    • https://uploads.strikinglycdn.com/files/56133d39-7521-46e6-b3e3-3c6ca8e142eb/what_is_your_endocrine_system_made_up_of.pdf
    • https://s3.amazonaws.com/wuxupewu/buddhist_anarchism.pdf
    • https://s3.amazonaws.com/rawesaragegugar/zalebevonodu.pdf
    • http://momerulazem.rf.gd/dexojapukemedubuv.pdf
    • https://s3.amazonaws.com/wikurixobelu/24695434231.pdf
    • http://sufuturafo.epizy.com/slingbox_m2_price.pdf
    • https://uploads.strikinglycdn.com/files/f77a9ffb-92dc-408d-a228-ed6c080629c0/ryobi_2000_psi_pressure_washer_specs.pdf
    • http://tuladupanekeziv.epizy.com/41412461777.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_off0000e476.bin
e8f9fb08c68b735e4c3645780af99d73365c02489e33988f1d47d616a565a129		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE476 5656 bytes
font_01_sfnt_off0000f7b8.bin
7b5f9bb6e299128cd39ad03750174c58dcc2e7732da75b4aa69c75bb769bde1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B8 11432 bytes

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