Malicious PDF — malware analysis report

Static analysis result for SHA-256 39e9f68a4b08cf1e…

MALICIOUS

PDF

35.8 KB Created: 2021-06-17 19:32:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d7c308590a4d6f91ae2acea84957cea4 SHA-1: 7e0408605c24c4a631ce8459cbba3ebc88aa93ab SHA-256: 39e9f68a4b08cf1e22a1ca0b045a3adbb8bef16f0004a3dbb1cb5f87f71e4d82
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks, specifically mentioning 'Robux' and 'game hack'. It contains multiple embedded URLs, including a primary redirector at http://netcdn.co/app/431946152/how-to-get-free-robux-no-builders-club-2021-game-hack, which is flagged as malicious. The document's structure and content strongly suggest it is designed to trick users into visiting malicious sites, likely for credential harvesting or malware distribution.

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-no-builders-club-2021-game-hack In PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/roblox-item-codes-free_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/new-map-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/acuont-stealer-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/roblox-free-clothes-in-catalog_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/roblox-hacked-pour-avoir-des-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/can-you-get-banned-for-cheating-on-private-server-roblox_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/roblox-robux-generator-free-robux_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/case-island-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/roblox-create-avatar-free_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/roblox-hack-week-2021-2_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/how-to-inject-code-into-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/free-robux-site-for-comuters_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/roblox-hack-obc-2021_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/can-you-get-roblox-for-free-on-xbox-360_GM431946152.pdfIn PDF document text
    • https://www.colegiodearquitectoscdmx.org/wp-content/uploads/fsqm-files/test-all-free-roblox-gear-free-admin-scripts_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_off00003362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3362 22360 bytes
SHA-256: 275c993ac36954e51b245ce9132fb6e9173a610f64e4de97e81d00d2181eb06a
font_01_sfnt_off0000651f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x651F 19568 bytes
SHA-256: aebef42764da232e43e12bb50f953498c28dd5a24919dfb8190475e86e1890b4

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