Malicious PDF — malware analysis report

Static analysis result for SHA-256 6be9952a1d7e850d…

MALICIOUS

PDF

47.4 KB Created: 2021-06-04 03:42:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 82ecc4784645be03b252760bce6694e0 SHA-1: a17cdc8f358b211aa947ce96cbe437430bee200c SHA-256: 6be9952a1d7e850d6b5d643d12393eb48727ea7b561044f889ad3bc1a3c2b8c4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free currency, directing users to the URL https://netcdn.online/app/431946152/free-roblox-accounts-with-robux-that-work-2021-game-hack. This URL, along with numerous others found in the document, likely serves as a redirector to malicious sites or downloaders. The ML classifier also flagged this PDF as malicious, supporting the assessment of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.online/app/431946152/free-roblox-accounts-with-robux-that-work-2021-game-hack PDF link annotation
    • http://library.acehresearch.org/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-without-doing-anything_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_off000052a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52A2 28012 bytes
SHA-256: 8eefec7d9ab0909011103cce128f188b2e546d0b6c295d24f417fa9c8d422f2d
font_01_sfnt_off00009352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9352 19476 bytes
SHA-256: 4c7cb67921980cc467a624d7be0aa4f8f19dcdcb8d4cb789adc94de6f70366aa

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