Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda789e6fcd4b7fc…

MALICIOUS

PDF

44.9 KB Created: 2021-06-07 18:41:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7a97af24acbc425e9c66fef09ca406c3 SHA-1: 20b8f1da7fa46a19f0ed8f2f210acde18ac72154 SHA-256: eda789e6fcd4b7fc52cb21e26df30e848a24d88c2dab72ff30ece022d803eac1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising "free Robux" and "game hacks". The ML classifier also flagged this PDF as malicious. The embedded links are designed to lure users into clicking them, likely leading to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/free-robux-earn-robux-game-hack In PDF document text
    • http://meisterhaus-guterl.de/images/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/roblox-free-robux-games-that-work-2021_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/robux-boost_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/hack-a-game_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/how-do-you-get-robux_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_004_off0000525e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x525E 25848 bytes
SHA-256: 95297227272af44d15414c56050d5692baa7eca17c02d7c307edf39b1b58dfa8
font_01_sfnt_off00008d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D02 18244 bytes
SHA-256: b6014a1bf70a80b5b7176295bd11553985cf3fccea183fb301f46a2e8db4226f

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