Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cecec02bc606d23…

MALICIOUS

PDF

36.3 KB Created: 2021-07-06 10:29:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fad25e044c41d884ea311acc28b10c02 SHA-1: 60b240fa5e19327c981ca521e7f35ce5ccd798a9 SHA-256: 3cecec02bc606d2399d0670e30ba7111c35016d348a1440a50d17e615dc4c4f7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • 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 http://netcdn.tw/app/406889139/coin-master-free-spins-deutsch-download-2021-link-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/free-red-wings-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-dragon-ball-advanced-battle-points-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-how-to-hack-peoples-accounts_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-asset-download-for-t-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-someone-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-videos-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/cool-roblox-costumes-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robux-gratis-hack-para-android_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/robux-sign_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32DC 23192 bytes
SHA-256: 67d84adc48cfe54e9518bec9941e01dfa3bbb15adc4a945727e1c6b508431bfa
font_01_sfnt_off0000673f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x673F 19632 bytes
SHA-256: 4e1e4b1e8d3655a4fd2b5afc87c9ac7a485a461542332519e216bb70138126d7

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