Malicious PDF — malware analysis report

Static analysis result for SHA-256 261d8ee5f4a405a6…

MALICIOUS

PDF

43.9 KB Created: 2021-05-16 00:33:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9d63bea2c609e4148d9b29b8ef424598 SHA-1: 68848fa14ec53f5a97753ccdc83468a6f16d763d SHA-256: 261d8ee5f4a405a69d59097f3659231275bbcf39441b72b9dd0a1fbeb4896ef1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, pointing to websites offering 'free Robux' or game hacks. The primary URL, https://netcdn.xyz/app/431946152/free-robux-generator-2021-no-survey-game-hack, is likely a lure for a phishing or scam operation. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-generator-2021-no-survey-game-hack
    • http://poltekkeskhjogja.ac.id/images/play-coin-master-online-free_GM406889139.pdf
    • http://poltekkeskhjogja.ac.id/images/free-coin-master-spins-blog_GM406889139.pdf
    • http://poltekkeskhjogja.ac.id/images/roblox-sexually-abused_GM431946152.pdf
    • http://poltekkeskhjogja.ac.id/images/coin-master-free-snacks-link_GM406889139.pdf
    • http://poltekkeskhjogja.ac.id/images/roblox-bux-free_GM431946152.pdf
    • http://poltekkeskhjogja.ac.id/images/how-to-coin-master-hack_GM406889139.pdf
    • http://poltekkeskhjogja.ac.id/images/free-robux-websites-that-actually-work_GM431946152.pdf
    • http://poltekkeskhjogja.ac.id/images/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://poltekkeskhjogja.ac.id/images/coin-master-no-download-app-but-play-for-free_GM406889139.pdf
    • http://poltekkeskhjogja.ac.id/images/coin-master-hack-facebook_GM406889139.pdf
    • http://poltekkeskhjogja.ac.id/images/coin-master-free-spins-gratis_GM406889139.pdf
    • http://poltekkeskhjogja.ac.id/images/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdf
    • http://poltekkeskhjogja.ac.id/images/coin-master-heaven-free-spins-today_GM406889139.pdf
    • http://poltekkeskhjogja.ac.id/images/collect-free-spins-coin-master_GM406889139.pdf
    • http://poltekkeskhjogja.ac.id/images/free-daily-spins-coin-master_GM406889139.pdf
    • http://poltekkeskhjogja.ac.id/images/coin-master-coins-free_GM406889139.pdf
    • http://poltekkeskhjogja.ac.id/images/how-can-you-get-free-robux_GM431946152.pdf
    • http://poltekkeskhjogja.ac.id/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdf
    • http://poltekkeskhjogja.ac.id/images/coin-master-free-gift-links-2021_GM406889139.pdf
    • http://poltekkeskhjogja.ac.id/images/free-robux-codes-no-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a47.bin
f54883514a18e6500d79d136489d9a29bb35fd041facb91b95910070f3addb96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A47 26648 bytes
font_01_sfnt_off000086e6.bin
6a3befe032ce85dfab02daa9542f37d979e32cd852f1a969db8cf02301732b57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86E6 19044 bytes

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