Malicious PDF — malware analysis report

Static analysis result for SHA-256 973c524c4e1e04a5…

MALICIOUS

PDF

78.5 KB Created: 2021-03-29 01:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e540697bd9fa3f4b847b2204271ac0ae SHA-1: 7d5da0f06690b6091d0a78fabd6da2dc329dcf2c SHA-256: 973c524c4e1e04a5c05067d3d202081ee2d33957ec6e26479f5cf5ea448d3a3d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a mass of external links, with the primary suspicious URL being https://zajinet.ru/award?keyword=types+of+functional+strategy+pdf. The document body is heavily obfuscated, but the presence of numerous external links suggests a link farm or phishing attempt designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/award?keyword=types+of+functional+strategy+pdf
    • http://notdull-eng.online/ludoririsizixewaxa2ycjy.pdf
    • http://torchland.xyz/in_the_heights_original_broadway_cast_recording_downloadoz6p0.pdf
    • https://cdn-cms.f-static.net/uploads/4470402/normal_6022d7733d937.pdf
    • http://sfhgfje5df.xyz/sauder_panel_tv_stand_instructionseow6l.pdf
    • http://poxumanavofeboz.scienceontheweb.net/30720760167.pdf
    • https://cdn-cms.f-static.net/uploads/4451755/normal_6012ef371f354.pdf
    • http://djami.ru/dixiferorejewumetuq4mal.pdf
    • https://static.s123-cdn-static.com/uploads/4407788/normal_5ff23ada7e92c.pdf
    • http://dazopumanufek.iblogger.org/wubupib.pdf
    • http://oblakova.ru/58933878659v3ika.pdf
    • http://raxawevamavox.getenjoyment.net/fadebosadubigip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5fb3b2f4-e86d-4029-b823-ac5950ddf4c1.filesusr.com/ugd/c0aa49_c6a53ef7b5594d918c64e4e1c0d89421.pdf?index=true
    • http://kufekisawisewo.onlinewebshop.net/accumulator_hydraulic_system.pdf
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_82e52f6a78344a7c8cd03a2c646c3cea.pdf?index=true
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_eb73147938444b6b8810c442157b984b.pdf?index=true
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_79e8db042b9b4a79947b769294cd3290.pdf?index=true
    • http://kewivifonawati.epizy.com/25093158730.pdf
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_04557804b12b4a738cf5f597fdc69c3f.pdf?index=true
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_a2847ca443104c0e8caa60ddbce7abbe.pdf?index=true
    • https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_06b587abdebc4b02a3d328919fd3171f.pdf?index=true
    • http://fezibebub.rf.gd/agora_eu_passo_direito_administrativo.pdf
    • http://wokixewo.epizy.com/44290913520.pdf
    • https://4b3c1411-62fe-4b74-ac0d-dad8ff5dd90a.filesusr.com/ugd/d10829_cbc6762b9dfb4d288650c926e6adb6a5.pdf?index=true
    • https://06e27459-8a58-4d01-a48e-f853eab966f6.filesusr.com/ugd/55f1a0_aa656fe282e8497b870d95b51ececa52.pdf?index=true
    • https://82656f1f-dd0f-4426-89ca-c5688288f975.filesusr.com/ugd/56de54_830951d8f3f0429a9b0c032d2c1d5a5e.pdf?index=true
    • 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_off0000f4f7.bin
1dce7a0d472edb766749f229c8d6862c3d142a89548c084ea41f4c8ece82b513		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F7 5376 bytes
font_01_sfnt_off0001075b.bin
a889e49adf98c66a14a8ad04e091a419d62a27c965b68f2a7b79956c49d588c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1075B 10968 bytes

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