Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe7e1a50379953f…

MALICIOUS

PDF

35.2 KB Created: 2021-06-28 20:58:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 454d55d6fc55934d5a19fb12b20d14f9 SHA-1: 168c8eaded196ceecab5697e5b42f620088ba2f6 SHA-256: cbe7e1a50379953fd4d101d588459359ede9dac90d3e32c27bdc062ddf1964f2
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are hosted on `lib.fisipumt.ac.id` and appear to be part of a link farm. The primary lure is related to game hacks and free in-game currency for popular games like Roblox and Coin Master. The heuristic `PDF_GAME_HACK_REDIRECT_LURE` indicates these links likely redirect to malicious content or phishing pages. No scripts were extracted, but the sheer volume of links and the nature of the lures suggest a high probability of malicious intent, likely to download further malware or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-hacks-robux-download-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-weight-lifting-simulator-2-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-2021-youtube_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/como-hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-accounts-with-obc-and-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/download-coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-hack-name-and-password_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/treelands-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-coins-and-spins-for-coin-master-game_GM406889139.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_off000030fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FD 22616 bytes
SHA-256: 73798ac08d5b3d2f56ce7e94f2541391f080f0088b52a5985552c7ab133ac38a
font_01_sfnt_off00006383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6383 19304 bytes
SHA-256: 4ae20cb185beb08a7aaffe7d33ebabb06a4e02d31466f742090236261e0ec9a7

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