Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f27e99ddb2b4b8…

MALICIOUS

PDF

35.5 KB Created: 2021-06-24 06:38:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7b33e4b7b6a573020dddf4122d508de3 SHA-1: 2dfa0503ddc5ed459e46f1882d6fba6b73a8ce8c SHA-256: d4f27e99ddb2b4b8df66f9824081c86ca5da3626e6d5710bb2dc1a7c752f1608
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link and text related to 'free hats on Roblox', which is a common lure for users seeking in-game advantages. The embedded URL points to a suspicious domain, suggesting an attempt to redirect the user to a malicious download or exploit. The ML classifier also flagged this PDF as malicious with high confidence.

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-hats-on-roblox-game-hack In PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/robux-hack-february-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-games-free_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-apps-info-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-scam-games-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-pizza-hack_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-hack-somones-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-minecraft-java-account_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_off000033a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33A6 22484 bytes
SHA-256: fdb7dcc03a9119a108ba8a2fe07fc85a2bb1c5a5a6dcbe3532b3642d23cfadc7
font_01_sfnt_off000065f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F2 18920 bytes
SHA-256: ed9cc6ddef7d1a444e8975af02753321d3e73dce2aace76f17ee3e5b5a163ad0

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