Malicious PDF — malware analysis report

Static analysis result for SHA-256 897a5362f6bf6f1b…

MALICIOUS

PDF

35.4 KB Created: 2021-06-25 15:16:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 982e409ccbc7243ccf2afad74483e0c9 SHA-1: 30c58646556d49b30a5815ed513fde557ebae9bf SHA-256: 897a5362f6bf6f1b18daf5e21014dc3a3b86261650a8ddc86f1f4434eaa7378a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and free currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn serves further malicious PDF files. The document body contains numerous URLs related to game hacking and free currency, reinforcing the lure. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/hacks-para-roblox-agosto-2021-game-hack In PDF document text
    • http://regattamaritimegroup.com/uploaded_files/userfiles/files/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://regattamaritimegroup.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://regattamaritimegroup.com/uploaded_files/userfiles/files/how-to-hack-on-roblox-mac_GM431946152.pdfIn PDF document text
    • http://regattamaritimegroup.com/uploaded_files/userfiles/files/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://regattamaritimegroup.com/uploaded_files/userfiles/files/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • http://regattamaritimegroup.com/uploaded_files/userfiles/files/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://regattamaritimegroup.com/uploaded_files/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://regattamaritimegroup.com/uploaded_files/userfiles/files/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://regattamaritimegroup.com/uploaded_files/userfiles/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://regattamaritimegroup.com/uploaded_files/userfiles/files/body-roblox_GM431946152.pdfIn PDF document text
    • http://regattamaritimegroup.com/uploaded_files/userfiles/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://regattamaritimegroup.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://regattamaritimegroup.com/uploaded_files/userfiles/files/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://regattamaritimegroup.com/uploaded_files/userfiles/files/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://regattamaritimegroup.com/uploaded_files/userfiles/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://regattamaritimegroup.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://regattamaritimegroup.com/uploaded_files/userfiles/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://regattamaritimegroup.com/uploaded_files/userfiles/files/full-throttle-hack-script-roblox_GM431946152.pdfIn PDF document text
    • http://regattamaritimegroup.com/uploaded_files/userfiles/files/cheat-roblox-dungeon-quest-installer_GM431946152.pdfIn PDF document text
    • http://regattamaritimegroup.com/uploaded_files/userfiles/files/roblox-hack-me-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_off00003248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3248 22476 bytes
SHA-256: 392c6aaf245e67a1ca28c19deaa2f9ce3f2e0247b2c27227719b281d396a6813
font_01_sfnt_off00006459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6459 19316 bytes
SHA-256: c5ff4ba46a5f144e068d4e8f10831f0945b0a98aa651f177630d6d46f2480016

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