Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd0cf801cc56abd…

MALICIOUS

PDF

43.1 KB Created: 2021-05-11 04:01:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a837bb4db3f66cf322955ae05c6ec531 SHA-1: 2ac1b5ebce154cea7f71970b866e8c72472dd545 SHA-256: 9dd0cf801cc56abda8d84331e24c8108feea014870abc472a6b4d87f8e8467e6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to known malicious redirectors, disguised as "free Robux" or game hacks, which is a common lure for phishing or malware distribution. The heuristic firings strongly indicate malicious redirector infrastructure and a lure for game-related exploits. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/431946152/how-do-i-get-free-robux-on-roblox-game-hack In PDF document text
    • http://perpus.polimarim.online/repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-hack-root_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-hack-roblox-passwords_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
stream_003_off00004b69.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B69 25196 bytes
SHA-256: 911d2e7bf332446fd2c9c112e7f473d927a08cf7331ccf797cd59513b91cb61d
font_01_sfnt_off00008581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8581 18524 bytes
SHA-256: 4ccd670e6a0bad46446eeab730d71d218c542e1f5d690955267ad9a8693a3722

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