Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc9a13c46ef5bdc5…

MALICIOUS

PDF

43.3 KB Created: 2021-05-11 01:32:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1b82995f71792b78329dee606187bd82 SHA-1: 00f01bbc3e3f3f0e71ec0536b1e282f536bb6a36 SHA-256: dc9a13c46ef5bdc5be9ef23b6c217ee6484dceb14d3fdc78b281dc61f3e6c401
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The primary link, https://netcdn.xyz/app/406889139/coin-master-hack-version-2021-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/406889139/coin-master-hack-version-2021-game-hack In PDF document text
    • http://librarystkippgribl.com//repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/113-hacked-client_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-hack-version-download-ios_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/google-moon-active_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-game-free_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-free-spin-link-today-download_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/master-coin-free-spin-daily_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_003_off000049b5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B5 26884 bytes
SHA-256: b410e943d019ec53f7b1ffc2cb4a96439977b1424f096ef2ec7d1d9c91180d28
font_01_sfnt_off000086e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86E0 18252 bytes
SHA-256: 85f6cbf22caabfd1980f39a563a7f3700d8edada2923e9ca7ca64ea978e7e6b3

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