Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8a375bbdf435592…

MALICIOUS

PDF

43.2 KB Created: 2021-04-25 07:31:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b38cac22d8e97479ae63cf7c2819b837 SHA-1: 94aec8c6d34d9ff01f97ac8c6b3e345f394b0d86 SHA-256: a8a375bbdf43559290f7bfad8700397d0604eb12db8a73299e766a7a90c241f2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' lure, specifically targeting Roblox users. The embedded URL directs to a site that likely hosts malicious content or further redirects. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a social engineering attack aimed at tricking users into downloading potentially harmful files or visiting malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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-hack-no-offers-2021-game-hack PDF link annotation
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/youtube-free-roblox.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/roblox-jailbreak-money-hack-download.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-robux-website-survey.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/roblox-help-someone-hacked-me.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-hack-out-of-bank-roblox.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/roblox-fly-hack-download-2021.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/roblox-hack-aimbot-download.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/is-roblox-free-to-play.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-to-hack-joining-sumones-server-roblox.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/hacks-para-counter-blox-roblox.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_off000043b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x43B0 28920 bytes
SHA-256: 8cfe0de24b7940b77d5f60d506a41f173011c21624c0cda8cdde3da9a2f20c86
font_01_sfnt_off0000862f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x862F 18584 bytes
SHA-256: b56d295b413d22aeb215c40a3b7992cea1aefc04e064e9553752455f569ffe42

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