Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f2ce6bc36b1ff77…

MALICIOUS

PDF

41.8 KB Created: 2021-05-13 19:33:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ffa0ce7cf8d5f547982b771c111d7e0f SHA-1: 132b4392af4d0c183ce2b08190043634d1b19f9a SHA-256: 3f2ce6bc36b1ff77f7143796cb29a2c156e423b709a16f638024fa4b5f274fd1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, specifically promoting 'game hacks' and 'free spins' to lure users. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous links to known malicious infrastructure indicates a phishing or scam attempt. No scripts were extracted, but the document's structure and embedded links are designed to trick users into navigating to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-game-hack In PDF document text
    • http://roxe2banh.com/public/upload/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/fb-coin-master_GM406889139.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/coin-master-hack-ios-no-human-verification_GM406889139.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://roxe2banh.com/public/upload/files/free-roblox-svg_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
stream_003_off00004bb6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB6 24328 bytes
SHA-256: fae3ec1651d75857ed323270b0608908e70a7b6b8d159d0e6b54a863cf0292a1
font_01_sfnt_off000082f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F6 17544 bytes
SHA-256: 5ee316c89f58fa7ece53e10d1822e70a80b2e7ece9f31707ca69690d36fdc75d

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