Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfced69f348b1217…

MALICIOUS

PDF

80.4 KB Created: 2021-03-31 06:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2607ef44d82659632271afe81b93bec SHA-1: 2aca78ab91874883a7d99af5523d4feca5a73e71 SHA-256: bfced69f348b1217cde687cef83160f77cccfc0960ced750a785cdedeb92cd3c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier also indicate maliciousness. While no scripts were extracted, the presence of numerous external URLs, including suspicious ones like 'leonvi.ru', points towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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-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://leonvi.ru/wix?keyword=https+sites+google+com+view+sie+kashmir+and+home
    • https://nizovekakajet.weebly.com/uploads/1/3/4/7/134740669/zifudukege.pdf
    • http://pobesegu.scienceontheweb.net/63742020175.pdf
    • https://cdn-cms.f-static.net/uploads/4473642/normal_6019cc7f0e344.pdf
    • http://xasefosixojoloj.iblogger.org/arduino_uno_beginner_guide.pdf
    • http://forovasax.medianewsonline.com/42634042896.pdf
    • https://modisogisutoval.weebly.com/uploads/1/3/5/3/135390942/55445f905.pdf
    • http://dirozigumifew.scienceontheweb.net/muwewinikizixe.pdf
    • http://wowuzarupi.iblogger.org/nipexub.pdf
    • https://judelewufajog.weebly.com/uploads/1/3/4/5/134516313/konuk.pdf
    • https://cdn-cms.f-static.net/uploads/4389365/normal_601189218c112.pdf
    • http://tozaworewinox.mywebcommunity.org/how_to_create_stored_procedure_in_sql_server.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e1bfdee3-5c2f-4022-a9f0-81a6cbc8c9e6/introduction_to_computers_questions.pdf
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_a98521cac3fc411aa8ba0648bf77086c.pdf?index=true
    • https://013c3ecd-17dd-4738-ad87-554153c764a5.filesusr.com/ugd/36f25b_2ba7e7b86b8141a1a7ee2d368b6fcd7f.pdf?index=true
    • https://78ff948a-0765-49f5-a22c-0fbe0eba7848.filesusr.com/ugd/888d0b_44cd6e71dd9c4138835df403d3332890.pdf?index=true
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_783810c53ab7482a96114402d23fc1e5.pdf?index=true
    • https://uploads.strikinglycdn.com/files/dd5c82aa-4707-45c1-99eb-ba6a4384948f/73000257857.pdf
    • https://uploads.strikinglycdn.com/files/162e4509-056e-4434-881a-10901cf5f4e2/panotour_pro_2.5_tutorial.pdf
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_c09a439334d843b18b355e257d72dd29.pdf?index=true
    • http://fixidil.atwebpages.com/cours_d_anglais_debutant_gratuit.pdf
    • https://uploads.strikinglycdn.com/files/4c3905b0-fce8-48e2-91bd-81a0d4cb4210/division_2_college_football_teams_in_texas.pdf
    • https://uploads.strikinglycdn.com/files/b96e1601-6815-4b84-8fdc-c9c824fb39e8/nuzezaja.pdf
    • http://xukosebufeli.rf.gd/zedibijosagari.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfea.bin
e5273b48fc766041a64052f3a0825ad7039c7c00e58542b882b391f6bbff17a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEA 5664 bytes
font_01_sfnt_off0000f315.bin
d061a7b0af414995d808460de99524f7b4f13c5a9b3d86b37af9f5609da31b2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF315 10720 bytes
font_02_sfnt_off00011801.bin
ad1b349115f17c327716e8120d23906d83106d524c40ca9249565846e62089ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11801 18088 bytes

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