Malicious PDF — malware analysis report

Static analysis result for SHA-256 9241ba3ee1ccd45d…

MALICIOUS

PDF

50.2 KB Created: 2021-06-03 08:16:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b29c8895155391b2655a4bc6fe2435f1 SHA-1: bc168334ed1d15ecff0decaad621abc876cd2d1c SHA-256: 9241ba3ee1ccd45d0ba6d7022cb3cd27125fb2dba1b8acf06ef8130cc8108cff
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to a 'get-me-robux-for-free-game-hack' URL, a common lure for phishing or malware distribution. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9789

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 https://netcdn.online/app/431946152/get-me-robux-for-free-game-hack PDF link annotation
    • http://library.umla.ac.id//repository/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-pokemon-go-joystick-2021_GM1094591345.pdfIn PDF document text
    • http://library.umla.ac.id/repository/robux-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/robux-now_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/open-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51C8 29448 bytes
SHA-256: 9eec388510bfa360174b90e8207e97a4a7f554888a3ddce2bec66ef24f5eb94b
font_01_sfnt_off000095d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95D6 3500 bytes
SHA-256: 0ed1761f4e10049dbabdfde525d716995c1a30072e354a33f6c222630e768ae1
font_02_sfnt_off0000a176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA176 18312 bytes
SHA-256: 932e048767bb22e6267a54c454926b1d6572868c8ffb63cd4dd0c91a684054b1

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