Malicious PDF — malware analysis report

Static analysis result for SHA-256 c763d14e15b15b5a…

MALICIOUS

PDF

35.3 KB Created: 2021-06-25 20:39:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 071c2b40207563a3c6c88d24d00a506d SHA-1: 0f717c7365a3490fb307bc6973c5a84970bef215 SHA-256: c763d14e15b15b5a412303d63b5b1bb156ff0a633b769f89de27fb47dc0426b6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising "free generators" and "game hacks" for popular games. The primary lure URL is http://netcdn.co/app/431946152/roblox-unlimited-robux-hack-no-download-game-hack, which is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a common social engineering tactic to drive users to potentially malicious websites for scams or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.co/app/431946152/roblox-unlimited-robux-hack-no-download-game-hack In PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/free-robux-easy-steps_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/roblox-free-download-on-game_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/free-tiktok-comments_GM835599320.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/how-to-get-free-knives-in-roblox-assassin_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/coin-master-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/mcpe-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/free-robux-official-site_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikom-ima.ac.id/slims2/repository/get-me-robux-for-free_GM431946152.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
font_00_sfnt_off00002f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F66 23020 bytes
SHA-256: c7b44e5896b425d462cc9540b74930cb06fabc09690468ee15a2b83b0f625c48
font_01_sfnt_off000062be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BE 19784 bytes
SHA-256: a51fbdbe7f94995adbaa922f5cc692dd2b04175a8ce0febdadba3db00f12efbf

Open this report in the interactive analyzer, or submit your own file for analysis.