Malicious PDF — malware analysis report

Static analysis result for SHA-256 225c857dee9cad1e…

MALICIOUS

PDF

84.8 KB Created: 2021-04-06 06:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18f9c15f943527b5d8709c4199547fe2 SHA-1: 4bfb394f12586aa231f74af24008568b2339f3d5 SHA-256: 225c857dee9cad1ecac9837f14510be0fa39d92d70ca44350e319bdd28f7364c
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects 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 URIs suggest an attempt to redirect the user to a malicious site, potentially for a scam or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://baarspo.ru/strik?utm_term=dometic+duo+therm+brisk+air+conditioner
    • https://static.s123-cdn-static.com/uploads/4456377/normal_60012591cffc7.pdf
    • https://cdn-cms.f-static.net/uploads/4417670/normal_604e72b2afd95.pdf
    • http://lubevos.scienceontheweb.net/telijonatawurumifapave.pdf
    • http://xamojopilupivo.scienceontheweb.net/kidanuganexeguloweva.pdf
    • http://visetazide.medianewsonline.com/les_choristes_caresse_sur_l_ocan_sheet_music.pdf
    • http://pexulisinipev.sportsontheweb.net/21664565585.pdf
    • https://jaxuvoxet.weebly.com/uploads/1/3/5/9/135979876/tuxakut.pdf
    • http://sadogiropi.mypressonline.com/18293310353.pdf
    • http://vsspb.ru/roku_secret_menu_cec0o4ay.pdf
    • http://boraguw.medianewsonline.com/adjective_exercises.pdf
    • http://myirn.icu/wakekesijonufolx436a.pdf
    • https://ramekozedu.weebly.com/uploads/1/3/4/8/134852530/b6410b6243359.pdf
    • https://dekamukovesu.weebly.com/uploads/1/3/5/3/135324216/sipogokidux_gubewukurogefas.pdf
    • http://big-ita.space/907582419768qopi.pdf
    • https://xiwabuba.weebly.com/uploads/1/3/0/8/130813639/rixunora_kusopofen.pdf
    • http://tokudujadi.medianewsonline.com/19080953828.pdf
    • http://bijepitujutix.sportsontheweb.net/anthroposophy_in_everyday_life.pdf
    • http://ridunculus.com/fokafowetixunidome48q25.pdf
    • https://cdn-cms.f-static.net/uploads/4453734/normal_604079b18915c.pdf
    • https://cdn-cms.f-static.net/uploads/4501208/normal_6023c3fe6b50c.pdf
    • https://cdn-cms.f-static.net/uploads/4379035/normal_603094a8c095b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://manosotidokef.myartsonline.com/annotate_ubuntu.pdf
    • https://1c92f6d8-19eb-429c-9239-1cf6be91372f.filesusr.com/ugd/cc1a03_26ba4277bc314ab09045ffb74647e0ca.pdf?index=true
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_bc69d1e6c489463ca1dc0378d8090219.pdf?index=true
    • http://lurarapekakaka.atwebpages.com/17522812639.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_off00010d9c.bin
a578e15f7b7006a418c67a919fba9697ba9c691781dd256561145a9050fd09f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9C 5348 bytes
font_01_sfnt_off00011f9c.bin
92f00c273265299cc075990d581d533a08fb161fd2d1e12682da3ac3e7edcd95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9C 11096 bytes

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