Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef47e8ff7d2dcda…

MALICIOUS

PDF

39.7 KB Created: 2021-04-22 20:20:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4f9d357eb0c8c6fc3d6941571a5a754d SHA-1: 845b5a87026bfb3e31158b395bd9c5bfe433b9b4 SHA-256: 7ef47e8ff7d2dcdac87a03956b2c2cb50e52b0530ef72f8b1f3b514d32c06643
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 0.9941

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://netsecure.pro/app/431946152/roblox-free-wolf-tail-game-hack PDF link annotation
    • http://blueduna.com/images/roblox-creepy-april-foools-hack-face.pdfIn PDF document text
    • http://blueduna.com/images/roblox-jailbreak-cheats-noclip.pdfIn PDF document text
    • http://blueduna.com/images/how-to-hack-yourself-on-roblox.pdfIn PDF document text
    • http://blueduna.com/images/how-to-get-1m-robux-for-free-2021.pdfIn PDF document text
    • http://blueduna.com/images/roblox-hack-05-2021.pdfIn PDF document text
    • http://blueduna.com/images/speed-city-roblox-hack.pdfIn PDF document text
    • http://blueduna.com/images/best-free-roblox-executor.pdfIn PDF document text
    • http://blueduna.com/images/builders-club-hack-download-roblox.pdfIn PDF document text
    • http://blueduna.com/images/robux-hack-february-2021.pdfIn PDF document text
    • http://blueduna.com/images/swat-for-free-on-jail-break-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_off00003f58.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F58 24884 bytes
SHA-256: 1c8d9d96315a97fbcd07300ec5a01d156c241cf4c267fadb2cae2acfdf7701b0
font_01_sfnt_off000078da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78DA 18496 bytes
SHA-256: 7a37adfc6c01dad79cf1985ee9d105aba20d9183d6c9c26f5f79477dcbfc4139

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