Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd4ba2e3e86b2911…

MALICIOUS

PDF

33.5 KB Created: 2021-06-20 21:57:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fc604a8cfa8f1c2d6a2d6277e85bfe61 SHA-1: 28a6bfa68bb7221db005be5c1300836f77af6014 SHA-256: cd4ba2e3e86b29118df5d9e4604dba70d7ad2b23371fa1d825d547590b597a11
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacking and free in-game currency, directing users to a malicious redirector. The redirector, in turn, hosts numerous other malicious PDFs, indicating a chain of malicious content delivery. The ML classifier strongly flagged this PDF as malicious, supporting the observed redirection behavior.

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/how-to-script-roblox-games-hacking-game-hack In PDF document text
    • http://wwic.wales/uploads/files/files/roblox-critical-strike-deluxe-hacks_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/roblox-hack-2021-admin_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/free-robux-group_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/roblox-g_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://wwic.wales/uploads/files/files/girl-roblox-avatar_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_off00002f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F29 20984 bytes
SHA-256: 3486b1f6698506c2d56fc019b9df0b74196a10cec03f4327f20def65509b4c89
font_01_sfnt_off00005c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C99 19480 bytes
SHA-256: 0f105cb4b5a1809ff5388c43c32f18e0c286e6ece524b4f98ad1585d93dfbbe1