Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa1c5c78b652232…

MALICIOUS

PDF

48.5 KB Created: 2021-05-10 14:32:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: ee1d7a12e2ec7d3073ba16c124a39e6c SHA-1: 4417144b8c7261e1c9b3853b7cc290dcad81d466 SHA-256: efa1c5c78b652232ebaa9f9ea24e914009f7feb8c386e852b57d8888d2dc3abd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a lure for a "game hack" which redirects to malicious infrastructure, specifically the URL https://netcdn.xyz/app/406889139/coin-master-mod-apk-latest-hack-with-unlimited-free-spins-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it is designed to trick users into visiting this malicious URL, likely as part of a phishing or scam campaign. The presence of multiple benign URLs from daringman1kra.ddns.net suggests a pattern of hosting various lure documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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-mod-apk-latest-hack-with-unlimited-free-spins-game-hack In PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/coin-master_GM406889139.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://daringman1kra.ddns.net/__statics/gudangsoal/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ca1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CA1 24464 bytes
SHA-256: e7b081e96a5fa2397f4387ff8eea9f3c62d4378867f31df7706190a86f9a09c2
font_01_sfnt_off000084aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84AA 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off00009935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9935 19116 bytes
SHA-256: ec39511f044db0039b033061d0c06de0ea4b06e85abf4e03074bae323e4248a1

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