Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d42d9bda447651…

MALICIOUS

PDF

49.6 KB Created: 2021-05-12 02:34:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2d090bb768f94449635a4eed3d949569 SHA-1: 63b5279cb61115411d8c4d4415876ded54c9279a SHA-256: f2d42d9bda447651f2d40bd186621ae2e3db589168e549299abde40e70df63e1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a high-confidence heuristic indicating it links to a game hack redirector. The document body text also contains a URL related to 'how to get real robux', reinforcing the lure. While no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest it's designed to redirect users to malicious websites for potential scams or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9349

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.xyz/app/431946152/how-to-get-real-robux-game-hack PDF link annotation
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://perpus.stmkg.ac.id/stmkg-perpus/repository/roblox-land-free-robux_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_003_off00004dec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DEC 27772 bytes
SHA-256: 7761091806f2d7168fd651d6ffa6082f858c5d064e38aa5c230a2dcf29b1afc5
font_01_sfnt_off00008ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED5 6636 bytes
SHA-256: 62075f0fe13502d46afb6e55e83d440c29ef4988399537df1f86e7653ce3b744
font_02_sfnt_off00009ee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EE2 18420 bytes
SHA-256: c00d446c8157095122135a55285e302a912096a3f0aa6b81bb2c06de09994ea7

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