Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e1157498725b3b…

MALICIOUS

PDF

33.0 KB Created: 2021-07-16 06:31:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ed66f164a55a3c57e23fee4845ec7378 SHA-1: 311e713680ec818fc4cd4eeefd50ee49f584d242 SHA-256: 65e1157498725b3b0757e19865ad3243411a3af198dbede28be3d77d58c9639f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-severity heuristic firing for linking to a game hack generator, specifically targeting free gamepasses on Roblox. The embedded URL, http://netcdn.tw/app/431946152/how-to-get-free-gamepasses-on-roblox-game-hack, is the primary indicator of this lure. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest it's designed to trick users into downloading further malicious content or visiting a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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 http://netcdn.tw/app/431946152/how-to-get-free-gamepasses-on-roblox-game-hack PDF link annotation
    • https://www.zagi.hr/files/free-robux-group_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/slurp-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/roblox-bee-game-hack-to-play_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/roblox-sued_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ABA 22356 bytes
SHA-256: a1be8220bbb253eef7c0d11be99fc4bba0f1233450ee816c87692d8d6b324d80
font_01_sfnt_off00005c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C55 19064 bytes
SHA-256: a10f6fe082bb09dbc6aab56a11da0b1041b9d86dfcc586dc2c760ee5d2bfa76a

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