Malicious PDF — malware analysis report

Static analysis result for SHA-256 2718d5c3c71b03a2…

MALICIOUS

PDF

78.2 KB Created: 2021-03-15 09:31:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00a41d8cfffc518c31ba75acbd4309c2 SHA-1: 8c17c4ac921a15f934662dd81bf703a92b49e2ea SHA-256: 2718d5c3c71b03a27e982e0dbfc0dd304b07781706aceea9bbb08e704fff9099
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://jacksth.ru/wix?keyword=mobogenie+apk+store', which likely serves as a lure for users to download further malicious content. The presence of a visual download button heuristic further supports the phishing lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/wix?keyword=mobogenie+apk+store
    • http://pelabinowoguk.getenjoyment.net/21834545564.pdf
    • https://cdn-cms.f-static.net/uploads/4418791/normal_603e5f62c1048.pdf
    • https://cdn.sqhk.co/xaranoraf/icThfWk/werewolf_the_apocalypse_earthblood_gameplay.pdf
    • http://kitazixozakabu.sportsontheweb.net/31505232573.pdf
    • http://lojapidabud.mypressonline.com/pubosikizedetakolewarejes.pdf
    • http://pemizirevubel.mywebcommunity.org/nolog.pdf
    • https://cdn-cms.f-static.net/uploads/4410186/normal_60465d1b70750.pdf
    • http://nozatisesufi.scienceontheweb.net/gonura.pdf
    • https://cdn.sqhk.co/kasunelebak/ETpsIji/81602650032.pdf
    • https://cdn.sqhk.co/ruxuzobisu/MK5hiZX/48391628587.pdf
    • https://cdn.sqhk.co/bikegola/ihcfQhc/parler_conjugation_chart.pdf
    • https://cdn.sqhk.co/xijogedobu/ih99gcn/latest_viral_videos.pdf
    • https://cdn.sqhk.co/sadirorig/ngc8cii/banco_bradesco_sao_paulo_swift_code.pdf
    • http://normab-id.com/geronimo_stilton_series_1_collection_10_books_box_setf69qb.pdf
    • https://cdn.sqhk.co/fexilejedit/jFyicgi/counting_activities_for_preschoolers_pinterest.pdf
    • http://gimatadokij.mygamesonline.org/3711200585.pdf
    • http://cosmicgig.com/bengali_all_album_song_video9kpwd.pdf
    • http://bachanalytics.com/xetawerakulikawuwilyppd9.pdf
    • https://cdn.sqhk.co/rigizisojix/hbgjjcd/vinovuxivoworu.pdf
    • https://cdn.sqhk.co/rixutixim/bvRvKia/76317631344.pdf
    • https://static.s123-cdn-static.com/uploads/4368951/normal_60001f413f567.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lawesiwewif.onlinewebshop.net/66199464071.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_off0000f45f.bin
ab8d29033108f5a11ed65efdb3eee6ccb091e2edf66095989ed85c20f6c8ed0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF45F 5164 bytes
font_01_sfnt_off0001060d.bin
29b92b94c4fe77b4ff36a3ff54f606a21b0e78b3761ee93ba0b90fcb1d4ca2c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1060D 10988 bytes

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