Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce853da0ab7965e…

MALICIOUS

PDF

34.0 KB Created: 2021-06-29 15:17:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7da6537edfc95a48032d0d70531ad022 SHA-1: e7fcaac27452fc174e7683cee2b6f10c5730f9cb SHA-256: cce853da0ab7965e1b37054067a48aa5f39e10b8f7180116a8fdd82dddb3f811
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that lead to known malicious redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The ML classifier strongly flagged this PDF as malicious, and the presence of a visual download button further supports a deceptive user interaction. The primary goal appears to be redirecting users to potentially harmful websites.

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-free-rade-game-hack In PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-er_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-create-a-group-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/oh-yeah-yeah-shirt-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-super-super-happy-face-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-hack-computer_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-game-passes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-cbro-aimbot-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/kuso-ico-roblox-free-robux_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_off00002d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D90 22796 bytes
SHA-256: 145c40eb42b4a834efd4f314beba11ac95166ce9cfd88267c05cc143cd17e86c
font_01_sfnt_off0000607f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607F 18824 bytes
SHA-256: 85c2b3b818245c557e6ef94e96c5983a8432eff87fe534f47bcac4cd1105ed17

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