Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5ee413b1c6449b6…

MALICIOUS

PDF

74.8 KB Created: 2021-03-11 11:00:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a94c4d2f4a7b0eb3b266c7eb7c0482cc SHA-1: 23e07bc863618b1fee746f03acac2d26df061ae6 SHA-256: b5ee413b1c6449b6a8ffd5da5fe0d1a61498f73bf9680f877a91663c625924cb
104 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an embedded URL pointing to 'vilenefex.ru' suggests the document is designed to trick users into downloading a payload. Although no scripts were explicitly extracted, the PDF structure and heuristics indicate it's likely a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/award?keyword=arabic+novels+with+english+translation+pdf
    • http://dewiwusuxutez.iblogger.org/reservation_request_form_template.pdf
    • http://samelike.site/wanaxebenabamegimajaq2y4e.pdf
    • https://cdn.sqhk.co/kanedufopuma/Gfjhxgh/idle_balls_online.pdf
    • http://tekirivira.iblogger.org/badumunazomug.pdf
    • http://jekeluxuto.mywebcommunity.org/hp_stream_11_sd_card_capacity.pdf
    • http://igoscandinavia.com/julezuxik9hast.pdf
    • http://xepuxupipe.mywebcommunity.org/takobedor.pdf
    • https://cdn.sqhk.co/rabovafom/icjcEfd/linking_verbs_song_ants_go_marching.pdf
    • https://cdn.sqhk.co/gotakavapu/gjwhghi/nitopi.pdf
    • http://waxinexedodupij.22web.org/90930341765.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jujageritoxo.atwebpages.com/apostilas_de_atualidades_para_concursos.pdf
    • http://kopolug.myartsonline.com/16053247874.pdf
    • https://0c2a99dd-71fd-4a0d-b96f-672cfa785c21.filesusr.com/ugd/515c54_0415f063497c4707a4405fc3a04690fb.pdf?index=true
    • https://aa4c2489-c93b-4667-afab-104bf5323bad.filesusr.com/ugd/8b49c6_196b7d2eb110498ebb17bbe3ceb607a6.pdf?index=true
    • http://xeminujuri.epizy.com/8923031739.pdf
    • https://76b44699-1094-4fd8-8d4a-70b7be8159c3.filesusr.com/ugd/c450b2_2247c383d7b34f05a5b4390b758ab91b.pdf?index=true
    • http://bomepexajusopa.epizy.com/hp_pavilion_dv6_drivers_for_windows_10_64_bit_network_controller.pdf
    • https://uploads.strikinglycdn.com/files/49ea0d3c-f7d9-40fa-98a7-1658d54f9b52/suwijowoxojesagujoxunumo.pdf
    • https://uploads.strikinglycdn.com/files/a48b0d12-015c-4f17-ac85-28cfe655bea5/89218972242.pdf
    • http://nununad.myartsonline.com/officejet_pro_8600_ink_cartridge_replacement.pdf
    • https://uploads.strikinglycdn.com/files/f6ec8281-9d98-4ef2-849f-83aa58cc53c1/89612164006.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_off0000e680.bin
ae8de13beff6716eda2e7193b61a6a562bf6547cb268376f8847e380fb6be8d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE680 5696 bytes
font_01_sfnt_off0000f9f0.bin
1fd8a139b5b23e0724541faba9e01c92326cb845fb7936c84c30efd6909ed4bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F0 10476 bytes

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