Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb9d8bdbfdaecc6d…

MALICIOUS

PDF

83.5 KB Created: 2021-03-16 03:09:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4256edb6f972c95b734dc6bcd9f975dc SHA-1: 7a3c7acb05d21c876e5ed9ae09970bd0ef717f37 SHA-256: cb9d8bdbfdaecc6d45d29b94ed908589f0730809dc7c0f114a211a630e67fe6c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a domain associated with malicious activity. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to trick users into navigating to a potentially harmful site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=how+to+make+a+dachshund+stop+biting
    • http://vevaxogejaz.scienceontheweb.net/concepto_de_auditora_fiscal.pdf
    • https://cdn-cms.f-static.net/uploads/4413701/normal_6042c7f2beb6e.pdf
    • https://farumurul.weebly.com/uploads/1/3/5/3/135326432/roguvaxoxoz-wagefexusiwi.pdf
    • https://cdn-cms.f-static.net/uploads/4420905/normal_60179b6bcb80b.pdf
    • http://finipupote.mywebcommunity.org/ponniyin_selvan_movie_first_look_poster.pdf
    • https://petodudugagakot.weebly.com/uploads/1/3/4/6/134640630/06c9339.pdf
    • http://uscreditreport2021.info/singer_tiny_tailor_mending_machine_tt600nybhq.pdf
    • https://jegivobepumo.weebly.com/uploads/1/3/4/4/134444156/tavubojuwonegiv_salisu.pdf
    • https://static.s123-cdn-static.com/uploads/4469375/normal_60060e2bf3a24.pdf
    • http://dle-tpl.site/jirawipekizapevumage6u2hj.pdf
    • https://burakatotofok.weebly.com/uploads/1/3/1/8/131871829/wajosidujaviwekosipo.pdf
    • https://cdn-cms.f-static.net/uploads/4369802/normal_601a4fded80c5.pdf
    • http://supobesopo.mygamesonline.org/biology_class_11th_ncert_book.pdf
    • https://cdn-cms.f-static.net/uploads/4447434/normal_602183699e27c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5d751076-96be-44c3-a55f-a021e3634596/moxasemogijur.pdf
    • https://uploads.strikinglycdn.com/files/6c0f58b1-4f96-420f-921f-1e44cf21142d/dugiwizodevarasajugukop.pdf
    • https://uploads.strikinglycdn.com/files/43434496-7aba-48d1-990c-adc30f64f066/82210468144.pdf
    • http://sazebufaz.atwebpages.com/dowajativ.pdf
    • https://uploads.strikinglycdn.com/files/6ad90465-244b-47d7-a74b-475ba71b2ec9/dominos_garlic_parmesan_white_sauce_ingredients.pdf
    • http://xizibosoj.epizy.com/sociology_textbook.pdf
    • http://xadebomuf.rf.gd/tatakoripexopa.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_off00010918.bin
c7a99b1a23d71d3ed0a706a30b5e07aec22f89667fd830d0bed6ea62c9adfe75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10918 5616 bytes
font_01_sfnt_off00011c15.bin
465b9e9288e5b06a7736d02e3ae63623220b71f2d4b53af38c7d5690cd048a7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C15 10668 bytes

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