Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7981757fd65804…

MALICIOUS

PDF

45.6 KB Created: 2021-05-12 03:00:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 36815b6cb1a9db21e632241cfbaff2e8 SHA-1: 79dd61af95deca5f15a4154189ca3e65e9c5c13e SHA-256: 9d7981757fd65804f28cd154eb493da8ba921b369fca872f67b59fccca2ea929
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a game hack lure, specifically targeting Coin Master. The embedded URL, https://netcdn.xyz/app/406889139/coin-master-free-spin-link-app-game-hack, is likely the destination for this lure. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest an attempt to redirect users to a malicious site, potentially for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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-spin-link-app-game-hack PDF link annotation
    • https://www.vizyonproduction.com/application/uploads/assets/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.vizyonproduction.com/application/uploads/assets/files/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • https://www.vizyonproduction.com/application/uploads/assets/files/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://www.vizyonproduction.com/application/uploads/assets/files/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.vizyonproduction.com/application/uploads/assets/files/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.vizyonproduction.com/application/uploads/assets/files/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://www.vizyonproduction.com/application/uploads/assets/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://www.vizyonproduction.com/application/uploads/assets/files/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.vizyonproduction.com/application/uploads/assets/files/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • https://www.vizyonproduction.com/application/uploads/assets/files/lots-of-robux_GM431946152.pdfIn PDF document text
    • https://www.vizyonproduction.com/application/uploads/assets/files/coin-master-hack-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.vizyonproduction.com/application/uploads/assets/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://www.vizyonproduction.com/application/uploads/assets/files/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • https://www.vizyonproduction.com/application/uploads/assets/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://www.vizyonproduction.com/application/uploads/assets/files/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • https://www.vizyonproduction.com/application/uploads/assets/files/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.vizyonproduction.com/application/uploads/assets/files/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • https://www.vizyonproduction.com/application/uploads/assets/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.vizyonproduction.com/application/uploads/assets/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.vizyonproduction.com/application/uploads/assets/files/daily-coin-master-free-spin-link_GM406889139.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_off00004c50.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C50 25304 bytes
SHA-256: a096182f0a5f27a60b3b9664aeccbc5ed2162ca6b236eba7cfbd9244aa66423e
font_01_sfnt_off000086e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E5 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00009086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9086 18056 bytes
SHA-256: 82bd5e5fc9f9c8e10db102fb3f3c15aafc022ab197dd07e70821ea88e25dcd6f