Malicious PDF — malware analysis report

Static analysis result for SHA-256 80791c6bfe5d902b…

MALICIOUS

PDF

34.4 KB Created: 2021-06-28 03:40:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9021d055ae4744e349fb0d895d1eca42 SHA-1: c37afe69269b17addb52f869984a929fce34dc3a SHA-256: 80791c6bfe5d902be24fd863ac0062b6ded11ea3f9081c4f75d5784837baabd6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to entice users. It contains multiple links, including one to a known malicious redirector at http://netcdn.co/app/431946152/free-roblox-gift-card-codes-septemer-28-2021-game-hack, which likely serves as a gateway to further malicious content. The ML classifier also strongly indicated maliciousness.

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-roblox-gift-card-codes-septemer-28-2021-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-youtube-live_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/real-robux-generator_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-60-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-add-hacks-to-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-download-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-jailbreak-speed-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-codes_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_off00002e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E94 21632 bytes
SHA-256: 3ecb23e38ee03432a6a1d92e7c3c663b4980c301bc7f9186b61a88835e15e3be
font_01_sfnt_off00005dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFC 20096 bytes
SHA-256: fd75d74af4d82a61568d430b12c045155ba10f2b13d7305f2243bc527ce1d9d4