Malicious PDF — malware analysis report

Static analysis result for SHA-256 227331d8971009d7…

MALICIOUS

PDF

35.1 KB Created: 2021-06-25 12:07:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e510f79640118d8c816ee0b569ef90b2 SHA-1: be1fdc5fe494747f03316c4ac31f242de1e6a8ba SHA-256: 227331d8971009d795a463e16958ac6ed668750194351d3e6f397d97726b37a9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game hacks and currency to entice users. It contains multiple links, including one pointing to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/roblox-hack-noclip-download-pc-2021-13-feb-game-hack. The document body and heuristics indicate a workflow designed to lead users to download further malicious content, likely through the embedded URLs.

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/roblox-hack-noclip-download-pc-2021-13-feb-game-hack In PDF document text
    • http://elibrary.perludem.org/repository/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/vdeos-de-los-mejores-hackers-que-hackean-cuentas-en-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-roblox-cards-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/stole-models-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hacks-for-roblox-rubux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-robux-money-cheat_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-spin-link_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/gravity-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-stuff-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-roblox-on-pc-for-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/account-over-13-years-roblox-hack_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_off00002ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC9 22328 bytes
SHA-256: 2b22cddaafa6e4cc071dd5fa7d9f098f31fe62ce15e2b2311657829add4d4f5d
font_01_sfnt_off00006051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6051 20352 bytes
SHA-256: 28ea3b99d972cce128f71e1b6fbf487d3c1d0605d92c223cac709e9f2844d382