Malicious PDF — malware analysis report

Static analysis result for SHA-256 726405590c38a30b…

MALICIOUS

PDF

47.6 KB Created: 2021-06-03 08:43:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3d2af88b89ad38ebea4c4a4df9f2fb08 SHA-1: 95b0116ae51dfb5ee94302b2811ec4018515b539 SHA-256: 726405590c38a30b3e59b5b8842ee145131b1ce1571b7da5f23f55bc8a0d44a3
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 0.9769

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/406889139/link-for-free-coins-in-coin-master-game-hack PDF link annotation
    • http://digilib.stie-yppi.ac.id/repository/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/moon-active_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-generator-no-survey_GM431946152.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_off0000538f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x538F 25916 bytes
SHA-256: 661302160c840c162c8187d0a898516a15251730d5ccbe14a3d8ac4a4641f4cf
font_01_sfnt_off00008eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBA 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000098a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A5 17880 bytes
SHA-256: 2ba4049ee856ee16a7338789b9de70a28ae5aa09727d52a30852826d07af8f7c

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