Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb12448812593e9c…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 14:07:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0f22e34ed21734b6c43604fbab3cc276 SHA-1: a177e22c036764064e1d26c30fe4f5908c655340 SHA-256: eb12448812593e9cf54401439229d3a196d553945b4ca23964d259a70a39bee9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector at 'https://netcdn.online/app/431946152/roblox-arsenal-hack-game-hack'. The document body and heuristics indicate a lure related to game hacks and free currency, suggesting an attempt to trick users into visiting these malicious sites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure strongly suggest a phishing or malware distribution attempt.

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.online/app/431946152/roblox-arsenal-hack-game-hack In PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-do-you-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/real-free-robux-generator_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_off000050b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50B6 25804 bytes
SHA-256: a6560108cc1cdaa8c6bc549704f9c165343294f028975048ff43957d1eed2698
font_01_sfnt_off00008cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC1 18184 bytes
SHA-256: 950cb6c94e3217e8d5edf097fa87367098c5f84c9f1c4255a513a3effc23c56b

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