Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60f75028a394ccd…

MALICIOUS

PDF

44.3 KB Created: 2021-06-13 22:43:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2a5b2bf192eba9435bef931acf36537f SHA-1: 623eb455b98c1036617452999f2f94b8e560b948 SHA-256: a60f75028a394ccd001eea23d11d65d51dc3677f825c98449d64f1928baf44e9
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.co/app/431946152/hacks-to-walk-through-walls-on-roblox-game-hack PDF link annotation
    • http://katalog.gemalibrary.net/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/shirt-ash-on-roblox-free-on-shirt-free-on-shop_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-source_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/earn-free-robux-by-completing-offers-and-surveys_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
stream_003_off00004e4e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E4E 25400 bytes
SHA-256: 5d3acb1aa279f6dd09884b830e32eacd9099b24d86b62ae4886aea1fc7e15e91
font_01_sfnt_off000088df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88DF 18976 bytes
SHA-256: e474f2e192e5beaa7f55c0fb5e2f97c0494e9f4e166cc9bec41b868930fb85ff

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