Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a71eb60aa461b2…

MALICIOUS

PDF

41.3 KB Created: 2021-05-01 16:51:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 752b9c400b4cf4023c096d70911a9fce SHA-1: 4003ef912ee0af6fa2b45db57848adc87ec19f40 SHA-256: 12a71eb60aa461b286bd69f1d9cfc4d0aaf8375e28f2775aeefa965c637475ed
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase, 'CLICK HERE TO ACCESS ROBLOX GENERATOR', designed to lure users to external websites. The primary URL, https://netcdn.xyz/app/431946152/free-robux-gift-cards-not-used-game-hack, is flagged as a game hack redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to deliver a malicious payload or phish for credentials, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/free-robux-gift-cards-not-used-game-hack PDF link annotation
    • https://fridaytravelnepal.com/userfiles/files/how-to-cheat-in-roblox-parkour.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-roblox-protosmasher-whitlist-code-free.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-csgo-skins-hack.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-cookies-hack.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-become-a-hacker-on-roblox-jailbreak.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-free-iron-man.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-promo-codes-roblox-2021.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-hack-robux-2021-unlimited-robux-and-tix.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-just-enter-username-and-password.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-glitch-acsesoir-free.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_off00004278.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4278 25860 bytes
SHA-256: d672640d26c7feb4aeb14f07b5462d0f29bfe2ae495924504efdc23124c3dfda
font_01_sfnt_off00007dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC8 18828 bytes
SHA-256: bd9f6de43be6456a3f1c8289f10460ba12ad5755fab4cb71184f5fbefb0dc180

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