Malicious PDF — malware analysis report

Static analysis result for SHA-256 99b9b4de97bcd019…

MALICIOUS

PDF

42.7 KB Created: 2021-05-11 04:14:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2c5ff4dacad0639cff772be7ed049577 SHA-1: a027970cbb5def5dd385ca07a97d3d1b5c30898a SHA-256: 99b9b4de97bcd019b396e4b9d2482fe45c68b16fc776ee270dd1461847d5114a
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 0.9971

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/give-me-robux-now-game-hack PDF link annotation
    • http://jdlwealth.com/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://jdlwealth.com/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://jdlwealth.com/images/free-spins-coinmaster_GM406889139.pdfIn PDF document text
    • http://jdlwealth.com/images/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://jdlwealth.com/images/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://jdlwealth.com/images/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/wurst_GM479516143.pdfIn PDF document text
    • http://jdlwealth.com/images/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://jdlwealth.com/images/claim-roblox_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://jdlwealth.com/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://jdlwealth.com/images/minecraft-free_GM479516143.pdfIn PDF document text
    • http://jdlwealth.com/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/daily-free-spins-coin-master-2021_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_003_off00004aa7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AA7 25440 bytes
SHA-256: e96e89ce5dc43499d1b74ea093dcba78365c2b2399bbcb021ccf90e60b9cb6ff
font_01_sfnt_off0000840a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x840A 18444 bytes
SHA-256: da387504e4ee90144f6399ec13e2f6eb5be90933d390e8f78ca10c807e4b036a

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