Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a487fe544fe6d21…

MALICIOUS

PDF

44.0 KB Created: 2021-06-11 00:46:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 252eff395ba924f27efa1b847fb5c89b SHA-1: 4df933315b958e6ee362f8472498efca972d3d2d SHA-256: 6a487fe544fe6d215409f2ea348b8c5ae60905d3f42965cf4dbf7a9308462d6f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/free-robux-card-generator-no-survey-game-hack PDF link annotation
    • http://library.umuslim.ac.id//repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/pubg-uc-buy-online-pakistan_GM1330123889.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-advertisement_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-5-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-studio-free-robux_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_004_off00004e2e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E2E 25260 bytes
SHA-256: d19f41f4b3acb1c0e89086a4a1316be7ee1184692f7b9799cca38008d31e5e2b
font_01_sfnt_off00008782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8782 18816 bytes
SHA-256: d5deb41c34ce8057a658126ac69d638ad5d174f01a6b8adb8a4f8a040e10c98b

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