Malicious PDF — malware analysis report

Static analysis result for SHA-256 d415978d380f9ba3…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 08:15:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7dbfde768e9c00eeb48a268bec74044c SHA-1: 5fb811ae938db5005a34976e4133f3d9e65fa539 SHA-256: d415978d380f9ba31d561b09001a0e86bb438a8260a4a8b2dd5b7bf9751a218d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to a known malicious redirector, disguised as a generator for free in-game currency. The document body and heuristics confirm the lure is for game hacks and free currency, aiming to trick users into visiting the malicious URL. No scripts were extracted, but the PDF structure itself facilitates the malicious 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.tw/app/406889139/how-to-get-free-spins-and-coins-in-coin-master-game-hack In PDF document text
    • http://lib.uho.ac.id/library/repository/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-dbz-super-saiyan-war-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/tiktok-free-like-generator_GM835599320.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spins-on-coin-master_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
stream_002_off00003144.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3144 22896 bytes
SHA-256: e5ef71276a5933fa522dadeddd7016d990c26c22585af92e556615bf726fc263
font_01_sfnt_off000064c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C9 18512 bytes
SHA-256: 54df8a09cf421af6cac57c3a8dff085e717b90c55c616740be0d1644a88c75b3

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