Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d222f05a6a4c4d…

MALICIOUS

PDF

45.6 KB Created: 2021-06-11 13:15:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 696a532ad094abb4b62ae5d398543fce SHA-1: 1acf1b9f826f12c9ba6b77074c790e0d3278d491 SHA-256: 39d222f05a6a4c4da429b5b81013dda869b4337cd47645224e6ea35c24365d8b
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 0.9864

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/roblox-hack-robux-free-2021-download-game-hack PDF link annotation
    • http://msfs-eastafrica.com/images/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/fly-hack-prison-life-roblox_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/info-roblox-hack_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/grab-points-login_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/roblox-hack-download-for-pc_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-robux-images_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-to-get-free-robux-ultimate-gamer-365_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-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_off00004e66.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E66 27144 bytes
SHA-256: 99d5e3c88dbe99d7d4a5dbe7d2abfc358d8d0f411fff1f27dd37c6db40df00b1
font_01_sfnt_off00008c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C62 19396 bytes
SHA-256: c50b224599ca2c7bb5ee195071e329bb62278a8146c4abdf1f8186f1ccf97896

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