Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00ea45d72363d49…

MALICIOUS

PDF

36.4 KB Created: 2021-06-26 01:32:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 90e09fe9bae2c4bc3b71a66561928b0d SHA-1: df16b5dc41b9c3814866de53906ba2100abccd58 SHA-256: c00ea45d72363d495b84d3b337586b5a1adccea759781e4bfccf1f9d54953d85
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on them by promising free in-game currency or hacks. The primary link, http://netcdn.co/app/431946152/free-robux-without-app-download-game-hack, is identified as a malicious redirector. The document body and embedded links suggest a phishing or scam attempt, likely to lead users to further malicious content or potentially download unwanted software.

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/free-robux-without-app-download-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-scythe-script-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-game-free-to-play_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/2021-free-robux-daily-hack-created-by-robuxian_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-clothes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-60-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-speed-hacks-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/adidas-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/what-is-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-accounts-2021_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_off00003366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3366 22676 bytes
SHA-256: a3db4918bcbd02a1cb2f708c7ffde80c6d497f2684afba72ad904a6c984b8d9d
font_01_sfnt_off0000663e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x663E 20060 bytes
SHA-256: f030140d50c51e378377c361d2aff8824dc426bf672a64daaf9a1ae4fd77b56e

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