Malicious PDF — malware analysis report

Static analysis result for SHA-256 92da6624fd706b2d…

MALICIOUS

PDF

46.3 KB Created: 2021-05-10 21:45:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8f12d43a4696c6518edd497785a4040a SHA-1: d55a45570c54e43bcaf361ddcd351cc66f1a5b36 SHA-256: 92da6624fd706b2d6e31026c05bfbf791dd868d796050dc776af69baa18e5bb5
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 0.9278

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/406889139/coin-master-hack-review-game-hack PDF link annotation
    • http://cornerstonedurham.com/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://cornerstonedurham.com/images/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/roblox-install-free_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/coin-master-rare-cards-hack_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://cornerstonedurham.com/images/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/wahoo-gaming-co-free-robux_GM431946152.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_003_off00004824.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4824 24076 bytes
SHA-256: 54574eff6ffe94fea5f92ac35e813d34e3bca4452ecaa6f4364aaeceae95b2ee
font_01_sfnt_off00007e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E98 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off00009323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9323 17996 bytes
SHA-256: bfe601b020b171f100e70e38fab7406fb887819b27a361e00f5b71bc8f64446b

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