Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4cf32ba3e6ffcfd…

MALICIOUS

PDF

47.2 KB Created: 2021-05-14 18:45:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 84b1e5a71b675e83fa11ab83a48939bf SHA-1: 0263fac533774d64d886117ede841adc06079134 SHA-256: f4cf32ba3e6ffcfd17ef7fef93f555b494eed54d09d420cebf4bf483f9dd5cb9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically disguised as 'free generator / game hack' lures. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to a malicious site for further payload delivery or phishing. The presence of a visual download button further supports this malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/free-roblox-characters-game-hack In PDF document text
    • http://panaceafamilymedicine.com/images/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/20210-robux_GM431946152.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/free-robux-please_GM431946152.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://panaceafamilymedicine.com/images/robux-website_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a91.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A91 25264 bytes
SHA-256: e1b52f0190938de23c70f8e8fea17e28d9d5effa36812624bf7b556b04ee4ee2
font_01_sfnt_off00008528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8528 6768 bytes
SHA-256: fa93de321190668b294ff46149e4b98ac349b4fd022dcee9ecd964f7f59f3f9a
font_02_sfnt_off00009567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9567 18448 bytes
SHA-256: 0263947262242f4b31913ad3d0f55b2be151042c00d915c510b843208e81fc00

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