Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98218a58ab3ec4d…

MALICIOUS

PDF

33.2 KB Created: 2021-06-30 14:15:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5fcc668639d1c05ec8d421edacfbbe75 SHA-1: e627c315f13ea2ae9dd0bd2a9481702a287c937c SHA-256: b98218a58ab3ec4ddcc0d2fd088ae962b6a96385ed79e68e236069f45986c8c8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and free currency, with one URL identified as a malicious redirector. The document body reinforces this lure by mentioning 'how to get Robux fast' and includes numerous related links. This suggests the primary goal is to redirect users to potentially malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-get-robux-fast-no-hack-game-hack In PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/farming-simulator-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-look-like-a-hacker-in-roblox-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-fly-hack-in-roblox-tower-of-hell_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-hack-mad-city-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-instantly-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-5-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-2021-on-pc_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-hack-2021-iphone_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/gaming-cheats-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/hack-tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-exe_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
font_00_sfnt_off00002e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E1A 21180 bytes
SHA-256: df074b3a71262cff8905ec0eaeb47f5c21d2c75c15029620fe9b536565506275
font_01_sfnt_off00005c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C23 19152 bytes
SHA-256: 93ae1b6b79b7e7c42c441396939365639d438373d38ba697b103c804489e2d6c