Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3765b8fb7883335…

MALICIOUS

PDF

43.8 KB Created: 2021-06-08 00:38:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 29bfc05443ad3aa691b2c5af0d2bd141 SHA-1: 6d85e4bd4262a3f22cab0e810ef3d62fe17345bd SHA-256: a3765b8fb78833351bc29cc0baaca13c372edae3b178c5651f85c9f0d92f8590
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure for a 'Wall Hack Roblox 2021' and links to external URLs that promise game hacks or generators. These links likely redirect to malicious websites or initiate unwanted downloads. The ML classifier also flagged this PDF as malicious with high confidence.

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/wall-hack-roblox-2021-game-hack PDF link annotation
    • http://neltalen.nl/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/roblox-vehicle-simulator-money-cheat-engine_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://neltalen.nl/images/coin-game_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/is-tiktok-app-free_GM835599320.pdfIn PDF document text
    • http://neltalen.nl/images/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://neltalen.nl/images/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://neltalen.nl/images/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://neltalen.nl/images/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/ok-google-free-roblox_GM431946152.pdfIn PDF document text
    • http://neltalen.nl/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://neltalen.nl/images/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_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_off00004e5b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E5B 24540 bytes
SHA-256: e62988852c282ea5dff43c9e67bfdaf529b0402c0d71ca63191840695e339319
font_01_sfnt_off000086ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86CE 18784 bytes
SHA-256: ccda34d31aacd66563a69491cd7a0c21558893174b47203fbb1694bcf9ecb399