Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e76e3d6c071407e…

MALICIOUS

PDF

44.0 KB Created: 2021-05-17 10:08:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f24689e57147f7397f77ef0df3f4ccbb SHA-1: 25fd5a8c3120dce11cf5c0a1b17ef52a17ebd5d3 SHA-256: 8e76e3d6c071407e29a1df4fedae7f6e266d10421ead850ca821a0cf52c591cd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as game hacks and generators. The ML classifier also flagged the PDF as malicious. The embedded URLs suggest a phishing or scam attempt to lure users to potentially malicious sites. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/479516143/game-toolbox-game-hack In PDF document text
    • https://gryps.de/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • https://gryps.de/images/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/minecraft-tools_GM479516143.pdfIn PDF document text
    • https://gryps.de/images/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/how-to-log-out-of-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_off00004812.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4812 24560 bytes
SHA-256: 87e59970ac791ee4395ebad96444c4b4dcf96021c4dca2c139e754891d13a68c
font_01_sfnt_off00007ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF5 2856 bytes
SHA-256: 8c5d9bcb386d88c7f99323d8d482e46ea21dea038a5b842744dd5d39b26b2c44
font_02_sfnt_off000089cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89CB 18188 bytes
SHA-256: cc5ae47c5e11d0f88656729761c41b71782f27a7f5283d48097ca54d7cfe7015

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