Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc64711dc30b8568…

MALICIOUS

PDF

34.8 KB Created: 2021-07-02 01:57:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6f07c85543404d81aa9d8ce1288c295b SHA-1: 977976a47941ae1d1a43c9f8861435e97844f10b SHA-256: bc64711dc30b8568efc31d471b6ee48f6728e12da103b8faa37ac8395852025c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a malicious redirector, masquerading as a 'free generator / game hack' for Robux. The primary URL, http://netcdn.co/app/431946152/how-to-get-free-robux-september-2021-game-hack, is designed to lure users into clicking, likely leading to further malicious content or downloads. The document body and heuristics strongly indicate a social engineering tactic to trick users into visiting 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/how-to-get-free-robux-september-2021-game-hack In PDF document text
    • http://lib.stie-aub.ac.id/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/robux-gratuit-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-cheat-engine-no-download_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-item-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-cheat-fly-cheat-tab_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/players-involved-in-the-2021-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/adopt-me-roblox-building-hacks_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-make-roblox-tool-script-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-clone-tycoon-hacks_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-100-real-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-v3rmillion-cheat-engine-bypass-hack_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_off00002e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E5C 22516 bytes
SHA-256: 6069963db65ac264da99b6c6e8b16384a778fc23a79685043a36130aa8a52ff3
font_01_sfnt_off000060ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AB 19820 bytes
SHA-256: 132993811c356a962e88e337262a18c37ad825e8094e7680e59df08f29e56ac9