Malicious PDF — malware analysis report

Static analysis result for SHA-256 38004afaeb070c3a…

MALICIOUS

PDF

45.2 KB Created: 2021-06-04 02:28:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4c2fdf26891bf4285414d6e6d5a70488 SHA-1: 77ac061b24962b4ec3027dc532c9711a86854274 SHA-256: 38004afaeb070c3ac4157c401f7bd233bfb2ca028e4a775dfcb33fadd07da89d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically targeting users with lures for game hacks and virtual currency. The primary link, 'https://netcdn.online/app/431946152/free-robux-for-free-game-hack', is identified as a malicious redirector. The document body and numerous extracted URLs reinforce this lure, suggesting an attempt to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/free-robux-for-free-game-hack In PDF document text
    • http://lib.vipklh.ru/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-com-r_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coins-master-hacks_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-game-download-free_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_004_off00005092.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5092 26840 bytes
SHA-256: c5226ec3c603a48b6c57c46999e5e94c19c94426bc991e3830d33d90fe4a316e
font_01_sfnt_off00008ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE7 18012 bytes
SHA-256: 3ef9e48aa3d97d4217e004f7625a8cbae9320a74231b80a01553f6433e422360

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