Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c54d4e261827187…

MALICIOUS

PDF

33.8 KB Created: 2021-07-20 02:20:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b97beb90ba0f2976a98a7447754e1c93 SHA-1: 5916d97065a77c3e19fd937fd1c0448c741e8c39 SHA-256: 9c54d4e261827187cf23f5b01f84d66ac334019e4658a6759aacca69a65f3bad
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a heuristic firing for a 'GAME_HACK_REDIRECT_LURE', indicating a social engineering attempt to trick users into visiting malicious sites. The document body text and URLs suggest a lure related to game hacks and free currency. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent, likely leading to further malware delivery or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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 http://netcdn.tw/app/406889139/free-spins-for-coin-master-2021-game-hack PDF link annotation
    • http://lllaw.eu/images/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
    • http://lllaw.eu/images/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lllaw.eu/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://lllaw.eu/images/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lllaw.eu/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lllaw.eu/images/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://lllaw.eu/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://lllaw.eu/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://lllaw.eu/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://lllaw.eu/images/free-minecraft-java-account_GM479516143.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_off00002ce9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2CE9 23540 bytes
SHA-256: a496209664f391f84ea70c0e33135dfac58ea1466aa81df0359b8921a86aa609
font_01_sfnt_off00006244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6244 18288 bytes
SHA-256: 66febbde5b4b2b6a44609229e8681f3f0581fff3ed5f82ed8e3d83342858c217

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