Malicious PDF — malware analysis report

Static analysis result for SHA-256 9170ac4b064d7093…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 12:34:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f8f68d649e32572f603ea6c8c757fb0b SHA-1: 13ddd8c1d93e951e5cad39019f402d4593e3fb3a SHA-256: 9170ac4b064d7093daf4d52cba21b9a022d098d7702b389f150d01a50ca3581d
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 0.9865

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/roblox-gang-game-hack PDF link annotation
    • http://elibrary.fl.unud.ac.id/repository/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/pubg-uc-qiymetleri_GM1330123889.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/hack-coin-master-8-ball-pool_GM406889139.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
stream_004_off000050f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F6 25060 bytes
SHA-256: 381b8b39f2b9ef6a981427dab35075a691c6f40cac3d7c9fa072af2c6149eb16
font_01_sfnt_off000089a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A4 18300 bytes
SHA-256: 91f666fe4564d776efc04868df6c7de748ea3d878c0f7be790052d713bbb3004

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