Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b36639bbcad8c09…

MALICIOUS

PDF

32.5 KB Created: 2021-06-22 11:37:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cd6fdd07414daf35378f09b86f0a7c25 SHA-1: 2d46b1a6f0a193e226518d671f69382af7683863 SHA-256: 8b36639bbcad8c092c73f4856811170aacc901924917283aafbd344b52ad9bc0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as 'free generators' for popular games. The primary lure is the URL http://netcdn.co/app/431946152/what-is-free-roblox-generator-game-hack, which is flagged as malicious. The document body and embedded URLs suggest a scam aimed at tricking users into visiting potentially harmful websites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/what-is-free-roblox-generator-game-hack In PDF document text
    • http://babbibooth.com/images/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://babbibooth.com/images/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://babbibooth.com/images/roblox-card-free-fake-it_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/pubg-uc-transfer_GM1330123889.pdfIn PDF document text
    • http://babbibooth.com/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://babbibooth.com/images/roblox-cheat-spinbot_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/how-to-do-sex-hack-roblox_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • http://babbibooth.com/images/roblox-gang_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://babbibooth.com/images/how-to-get-free-coins-on-tiktok_GM835599320.pdfIn PDF document text
    • http://babbibooth.com/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://babbibooth.com/images/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://babbibooth.com/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://babbibooth.com/images/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/free-robux-generator-2021-no-human-verification-rearl_GM431946152.pdfIn PDF document text
    • http://babbibooth.com/images/windows-10-minecraft-free-with-java_GM479516143.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_off0000296e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x296E 22060 bytes
SHA-256: f6256290822002cfa395a2a205b973b747e6ee80273ceb9b8b330b114b2d64ba
font_01_sfnt_off00005a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A06 19116 bytes
SHA-256: cea0ad461769553537315a4136826a9ae957cd1fdb019ae06b2dcd373f387bba