Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4acae86247f5e8…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 07:11:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 6ddaa31ff87de8180ddb482450b15a93 SHA-1: 0f0b4e647dbf07f6039a4c6ff26eb4bb182918ff SHA-256: 2e4acae86247f5e8544898f91b0d6423efd44e630572b823ff2762593cd87d57
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/431946152/robux-best-game-hack PDF link annotation
    • http://library.stieyapan.ac.id//repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/mcpe-hacks_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-robux-and-tix-hack-game_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-tiktok-editor_GM835599320.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/easy-to-use-free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-coins-in-minecraft_GM479516143.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_off00002f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F27 22620 bytes
SHA-256: 6b7b3e0e31b9be19d0da3e1f8d8e109a9d63d90d984e6f06bf41e6871eabb29e
font_01_sfnt_off000061d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D5 18656 bytes
SHA-256: a9b734e54817a22fdd46b6eae3133a45a9261a925f04c001672fe4083b6bbc72

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