Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17a7d3d80e23505…

MALICIOUS

PDF

40.1 KB Created: 2021-04-25 08:16:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b058b98b89a970150dff661092b01db2 SHA-1: 53721e70b3b1bb071cf1341bea8a42009976650f SHA-256: b17a7d3d80e23505bd156cfc4bdc63783c64449d915af2d58d50b3dd4d9edbc7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent call-to-action for a "free generator / game hack" related to Roblox. The heuristic firings indicate this is a lure for potentially malicious content. While no scripts were directly extracted, the nature of the lure and the embedded URLs suggest an attempt to redirect the user to a site that may host malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/431946152/how-to-get-free-faces-on-roblox-phone-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/roblox-hack-add.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-robux-hack-download-mac.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/emporor-roblox-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/does-roblox-allow-free-rebux-websites.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-skirt-free-too-take.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-vip-for-roblox-free-video-star-egg.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-free-downlow.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-free-vip-server-ro-ghoul.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-tolls-roblox-ultimate-driving.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-galaxy-shirt-roblox.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_off000040d8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x40D8 24884 bytes
SHA-256: ebfb65068b477626d64d8676f401ade1fa3c15fe2d69570e19fca7d00929d3bf
font_01_sfnt_off000079ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79AD 18764 bytes
SHA-256: 1bd046d17eb8af7e61762f8ed9624c7647a675acf54c79a16a5277f2ca788302

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