Malicious PDF — malware analysis report

Static analysis result for SHA-256 051dc34a94828eea…

MALICIOUS

PDF

42.0 KB Created: 2021-05-17 04:44:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6e1b5c119bfecbf5a2f703e970357dd7 SHA-1: df3cc3930a50ddaf4e61b917e2d95052bf487a43 SHA-256: 051dc34a94828eea732126d4e2f13e99b119afe71bdbcadf4b9040a441a73007
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 0.9971

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/how-to-get-free-cards-for-coin-master-game-hack PDF link annotation
    • http://aeridefense.com/image/data/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/roblox-person_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/robux-free-com_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/hack-client_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_003_off000049aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49AA 25224 bytes
SHA-256: cb753612f8dd55136196b46dc615d2c8d59af8a553b44b3de1c4ce4660c988a8
font_01_sfnt_off00008276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8276 18048 bytes
SHA-256: c3f371278b7fe6873213599d15e2d537c4e536c02b9f7f2e86ee974651b3645e

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