Malicious PDF — malware analysis report

Static analysis result for SHA-256 f391d62d8afc1d56…

MALICIOUS

PDF

44.5 KB Created: 2021-06-03 12:02:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 010541f6caae703e646c353334c452fc SHA-1: 6ff72fab7623782e88be2cb6d1691652e75a60b7 SHA-256: f391d62d8afc1d565c4c34f3af1317bc0cbc7748f5c539f4ebc420f49c7c3264
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to malicious infrastructure, specifically advertising game hacks and free generators. The primary malicious link identified is https://netcdn.online/app/479516143/minecraft-18-9-hacked-client-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector designed to lure users to potentially harmful content.

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/479516143/minecraft-18-9-hacked-client-game-hack In PDF document text
    • http://www.digilib.uim.ac.id/repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-level-3_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-coins-spins_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_off0000542d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x542D 24164 bytes
SHA-256: 6f204e2cc90ba46fbd6d084da389bca6d9c3dc436f74134ccf51a2e514585516
font_01_sfnt_off00008af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF0 18464 bytes
SHA-256: f75936191b9599c86736d396a824739e91f72002e4403ab2a64ecb5cb265c811

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