Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c102f6564189bcf…

MALICIOUS

PDF

47.7 KB Created: 2021-06-02 18:06:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b16e4cf3e4a318ac4dd9ab8b8bb123a2 SHA-1: bba97b0e0b87ed2e87292b0cfacfe9041242e237 SHA-256: 9c102f6564189bcf2357bb89016eb7651b3ad2854095c010643cb83ec448cad0
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 0.9769

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.xyz/app/431946152/robux-free-codes-2021-game-hack PDF link annotation
    • http://www.vermaagri.com/uploaded_files/userfiles/files/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/offers-for-robux_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/free-spins-and-coins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005238.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5238 25036 bytes
SHA-256: 13db9d638dfc3f6b310b9ccc41457e352aebb29f0043750d3979643c688eecaa
font_01_sfnt_off00008c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C6F 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off0000967f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x967F 18588 bytes
SHA-256: 7f1849fae194a1d36f0216b9a102f43485b84d4bd8f127cd6918323fcd7940da

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