Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf68015846dea720…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 10:52:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: bd0ed90b9b6326ea05f815e199678edf SHA-1: 8563696c70a589516bb08a63a67616a273dc0807 SHA-256: bf68015846dea720c3b92dfb90dfcaf87e035d473b541fa2b22e5db95237c4ad
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 0.9980

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/431946152/how-to-change-your-roblox-username-for-free-game-hack PDF link annotation
    • https://vierabyragazze.com/upload/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-e-free_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-catalog-free-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-codes-for-robux-free_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-online-roblox-download_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/is-there-an-anti-cheat-on-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/robux-come_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-live_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-hack-csgo-on-roblox_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
font_00_sfnt_off00002fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAB 22580 bytes
SHA-256: 539339e38fc068a9096c4b61d347252a75187ad31fae29fef5ab8523b52e88c4
font_01_sfnt_off000061de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DE 19540 bytes
SHA-256: 931b08b03ca54b31686306823cbaeb68bb9b2d4519394e74376e5a024d3c9af4