Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f87f113a0928c57…

MALICIOUS

PDF

78.4 KB Created: 2021-04-03 21:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbd87a2bb75e87f3e8522b4a0d410960 SHA-1: 9064add4251bd27c410b2c723e32d33520281f89 SHA-256: 5f87f113a0928c572d1b2058c1e162234caaed6fcb34b8ae4a2ec8b7eb391910
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 URI pointing to a suspicious URL, likely intended 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 URI suggest it's designed to trick the user into navigating to a malicious site.

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://ponafet.ru/strik?utm_term=fork+lift+truck+driver+training
    • http://itravelimpressions.com/android_arsenal_viewer3rro9.pdf
    • http://frontend-developer-azaynullin.site/vexugebegabebebavagutosrwn03.pdf
    • http://detonic-ufficiale.website/tangled_cartoon_full_movie_freeywvvp.pdf
    • https://cdn-cms.f-static.net/uploads/4473340/normal_601782d1844c6.pdf
    • https://cdn-cms.f-static.net/uploads/4380230/normal_5fea2b4722b23.pdf
    • http://kzrovk.xyz/bulawurugobumh7lvj.pdf
    • http://gedadekenoz.mywebcommunity.org/fopedumoxaxibowimilegun.pdf
    • http://sun-italy.space/7219905564066f75.pdf
    • http://xozonline.ru/soresetilevumonarofe0ea3t.pdf
    • https://cdn-cms.f-static.net/uploads/4368996/normal_6049b778131a8.pdf
    • https://cdn-cms.f-static.net/uploads/4497093/normal_604d66a8c080a.pdf
    • https://cdn-cms.f-static.net/uploads/4408703/normal_60175a30c393a.pdf
    • http://bottlechainworld.com/30696542802hbv8q.pdf
    • http://zoo-taxi.site/how_to_look_up_driving_record_online4l4ue.pdf
    • http://copriyghtconfirmed.com/common_and_proper_nouns_sentences_worksheetsj3dns.pdf
    • http://hangzhoumetal.ru/what_is_a_molecular_crystalline_solidakd6t.pdf
    • https://cdn-cms.f-static.net/uploads/4409420/normal_603a421f79348.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wofavum.myartsonline.com/heteroanamnesis_adalah.pdf
    • http://wulibazosuxib.onlinewebshop.net/88461657307.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_off0000f6b0.bin
0a44a2d6ddea6f474920f93a242fb4e3c1d107d428b139a1b85c7c3a1514dcac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B0 5088 bytes
font_01_sfnt_off00010821.bin
8e9deb6da0d1e76ad0741b788d3f45d7011eef7b188a207cd061f6a6b2f28700		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10821 10468 bytes

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