Malicious PDF — malware analysis report

Static analysis result for SHA-256 512a777c907128b5…

MALICIOUS

PDF

43.0 KB Created: 2021-05-11 13:35:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 157af7a0ec8cc55a5597e20da9f5c8f3 SHA-1: 86e36fba6cd8833a77c89ba3dd8d704661713ae6 SHA-256: 512a777c907128b506889d15f0d0ea9eded40c9d1bdcf619dc4a61ad72ec51e2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-confidence heuristic indicating it links to a game hack lure. The document body and extracted URLs reinforce this, pointing to sites offering 'free generators' or 'hacks' for popular games. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for JavaScript execution or redirection to malicious content.

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/406889139/coin-master-free-2021-spin-link-game-hack PDF link annotation
    • http://www.myresidence.lu/userfiles/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/robux-gainer_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/robux-online_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/wurst-download_GM479516143.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/minecraft-for-ps3-free_GM479516143.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_off00004bd7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BD7 25184 bytes
SHA-256: 4fd372b7d8b40d24030572a604135eaddcf774b383f01ab43f90d07078cd931b
font_01_sfnt_off00008551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8551 18456 bytes
SHA-256: b7ae3d16bb028351929840db057611194e7c02105e6dbd3e36d0326cc4cd0414

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