Malicious PDF — malware analysis report

Static analysis result for SHA-256 56db55d8d53ffab8…

MALICIOUS

PDF

44.6 KB Created: 2021-05-14 17:25:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9ab15a43ca18d8c2edba87fde9485a4f SHA-1: c637473966a4609c5d685fe9bcd980d08b2155e2 SHA-256: 56db55d8d53ffab8ea303c5870ad629faf477ff8b6393970bd27d3b9dc1bd5e3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-priority heuristic indicating it links to a 'free generator / game hack' lure. The embedded URLs, including https://netcdn.xyz/app/431946152/roblox-cp-game-hack, are likely intended to redirect users to malicious content or download malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/roblox-cp-game-hack PDF link annotation
    • http://brinicombe.co.uk/images/roblox-a_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://brinicombe.co.uk/images/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-spin-and-daily-news-coin-master_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • http://brinicombe.co.uk/images/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/wurst-112_GM479516143.pdfIn PDF document text
    • http://brinicombe.co.uk/images/coinmaster_GM406889139.pdfIn PDF document text
    • http://brinicombe.co.uk/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://brinicombe.co.uk/images/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://brinicombe.co.uk/images/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://brinicombe.co.uk/images/roblox-password-hacker_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_off000048ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48CA 25204 bytes
SHA-256: 6ffbfab8bfeca91cc797021370cdeb68ddaa98b910cfd9c4a022a2235d1709fa
font_01_sfnt_off00008304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8304 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00008cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB2 17960 bytes
SHA-256: b4362ed69c91c8c7fb582cd3eb5794631eee1aca0fc0b19393ebd2862daffc5c

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