Malicious PDF — malware analysis report

Static analysis result for SHA-256 145384136c0421fe…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 09:09:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 04857559c3bcc333def60422a85842ff SHA-1: 4b9bb5c85056d059779ac1618ad30327360c6ba6 SHA-256: 145384136c0421fe88252c91f583f6116d5ad04983989663a3b179ffb5f176b7
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors and lures users with promises of free game currency or hacks. The primary malicious link identified is http://netcdn.tw/app/406889139/free-spins-october-28-2021-coin-master-game-hack. The document's structure and embedded URLs suggest an attempt to redirect the user to a site that likely hosts further malicious content or attempts to exploit the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-spins-october-28-2021-coin-master-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/without-human-verification-pubg-uc-hack_GM1330123889.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-hack-roblox-prison-life-v2-02_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/earn-free-robux-plus_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free4mobile24-com-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/snapes-free-download-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-hack-app-2021_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_002_off00003148.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3148 22996 bytes
SHA-256: 4c08f3643fbe30c9f6f4e98e798983ed32ab37eb5789ea85b1799ae0b7656fdc
font_01_sfnt_off00006512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6512 18944 bytes
SHA-256: 33a099d0463d5bcfa3a76cc4d65bb45a78717ed15b1179d1f103ad86d2662b61

Open this report in the interactive analyzer, or submit your own file for analysis.