Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f8d77aff400281…

MALICIOUS

PDF

45.1 KB Created: 2021-05-14 21:42:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bc514b2ab38dcc890e31039432abed20 SHA-1: 4c1a7b8e8deee8a5aec6663ed2abaa14c13c53c6 SHA-256: d7f8d77aff4002815a400dff6a33468491ccc015aaf13127b8f1e4244a4b3b98
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains lures for game hacks and free currency, directing users to a known malicious redirector. The document body and embedded URLs indicate a phishing attempt to trick users into visiting potentially malicious sites. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/406889139/coin-master-free-spin-and-coins-links-2021-game-hack In PDF document text
    • http://optiquedelavaunage.com/images/_GM479516143.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-hack-spins-ios_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://optiquedelavaunage.com/images/how-to-get-free-coins-on-coin-master_GM406889139.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_off000049af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49AF 23908 bytes
SHA-256: dec6233e9a469d1933ff03b4132b5672a2fbbf94b6484bf8c121b9b24c0b8135
font_01_sfnt_off00007ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF8 3560 bytes
SHA-256: c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93
font_02_sfnt_off00008c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7E 18632 bytes
SHA-256: bf450557b00699bdc36230f8bff75cef2d4ddc3329c11821453b6bd8c7be45f9

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