Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cdbfedd83374284…

MALICIOUS

PDF

34.5 KB Created: 2021-06-28 23:27:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3dde45d386944f8169104d8c54772060 SHA-1: 6b217fec745456648e24b8af12ef729d120d030b SHA-256: 2cdbfedd833742845346ea1b26358e9bd3aede2a4f57b69b768320069e84bc87
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as 'game hacks' or 'free currency' generators. The primary lure URL is http://netcdn.co/app/431946152/how-to-hack-roblox-accounts-to-get-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a redirection chain designed to lead users to potentially harmful content or further malware downloads.

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-hack-roblox-accounts-to-get-robux-game-hack In PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/alo-roblox-free-items_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-acounts-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-hack-pet-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/robux-download_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-codes-generrator_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_off000031c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C3 21624 bytes
SHA-256: a344efbda319e552b5542d9d22a29f55ab826961f13bd680b6e5cdadbffbd831
font_01_sfnt_off00006167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6167 19064 bytes
SHA-256: fab0c93def1e51e113df77d236c28adc898bbb11098b63c00306f8d541b08ac9

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