Malicious PDF — malware analysis report

Static analysis result for SHA-256 61a6988095225f4b…

MALICIOUS

PDF

41.8 KB Created: 2021-05-12 08:30:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: de70afbd0550f7ed9700609ce350bc73 SHA-1: 65d5819e83cc09836ac2d2c71b0727ccf4b7e4ed SHA-256: 61a6988095225f4beee9d0066d0950da99f362ca412ebd0912af1843c8c9db62
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically targeting users interested in game-related cheats and currency. The document body, though partially corrupted, contains references to 'Roblox' and 'game hack', aligning with the heuristic findings. The embedded URLs likely lead to further malicious content or phishing sites, serving as the primary mechanism for user compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/roblox-com-robux-game-hack In PDF document text
    • http://gestibrok.com/images/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://gestibrok.com/images/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://gestibrok.com/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://gestibrok.com/images/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://gestibrok.com/images/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://gestibrok.com/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/www-rubux_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://gestibrok.com/images/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://gestibrok.com/images/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://gestibrok.com/images/free-robux-websites-that-work_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_off00004691.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4691 25388 bytes
SHA-256: 9d0858412807b253f8247ba4d5d5f6cffe6d0b887e0eceb710e3ec960e6e3064
font_01_sfnt_off00008136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8136 18184 bytes
SHA-256: f249dc7b85a63207670df4799ed7b071bbb563f249806a7da362391acbd0ae63

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