Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e37e99950571beb…

MALICIOUS

PDF

45.0 KB Created: 2021-06-11 02:13:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d2f9a9f6b967df2edc74b43b293336a0 SHA-1: 3ece93f6dd5e66c24d20563fbd0e371bdbb44b8f SHA-256: 5e37e99950571beb52a0a98c036b5c146cd5d737e4572e88c8781e1d863bc331
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free in-game currency, directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious, and the embedded URLs are associated with such lures. The document's content and embedded links indicate an attempt to trick users into visiting a potentially harmful site, likely for credential harvesting or further malware delivery.

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.tw/app/431946152/how-to-get-roblox-jailbreak-hacka-game-hack PDF link annotation
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-white-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/descargar-roblox-hackeado-con-robux-infinitos-2021_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-tiktok-followers-real_GM835599320.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/best-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/bear-face-mask-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-hack-in-boku-no-roblox_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-hack-roblox-to-get-robux_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_004_off000051d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51D6 26188 bytes
SHA-256: da5183ad56664575dd5b33f6acacd15ec4e7a7cf3d907da721f9148274c4ce9f
font_01_sfnt_off00008bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB0 18736 bytes
SHA-256: 179673a71bd939bc5242699893ca1454467764f405e34cdc293e77daee80692b

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