Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0f68020c06abfb…

MALICIOUS

PDF

34.7 KB Created: 2021-06-28 09:48:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 59b8cd0d94b1fbbf731cebb0a0c1ebb6 SHA-1: 082bf78e9533f71250c5b2bf8b5ee726d933262d SHA-256: 0e0f68020c06abfb3bbc161adb7923606e77469fdda527a764c5543bf554335b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/robux-pin-codes-free-game-hack, which is presented as a 'free generator / game hack'. The document body and heuristics indicate a lure for free game items, likely leading to further malicious content or phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/robux-pin-codes-free-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/get-roblox-items-free-working-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/star-wars-lightsaber-roblox-free-level_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-codes-list_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-in-seconds-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/worst-client_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-howt-to-get-free-hats-on-rolbox-high-school_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-admin-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/download-hack-roblox-2021-fr_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-minecraft-survival-server_GM479516143.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_off00003112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3112 22136 bytes
SHA-256: 6e98719cdd9f428efb4cc9bbe54083bd98463a98079bf60fe1e4488a07fc83c7
font_01_sfnt_off0000623c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623C 19164 bytes
SHA-256: f9eecfc893b68b8cdb7b5f2712df05ee5587423e324d672b829b1f5ef8b10862