Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff0eaf4bf88a1c7c…

MALICIOUS

PDF

38.9 KB Created: 2021-04-22 23:17:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bc05e1e0396c7672854d0c6203fb1b21 SHA-1: 1711a391a85ac4580879d66113df61061fc1425e SHA-256: ff0eaf4bf88a1c7cea2f963dd69664e4d05e4dfae4837663b36ef034ef53e84f
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-support-free-robux-game-hack PDF link annotation
    • http://blueduna.com/images/roblox-is-there-a-way-to-get-free-robux.pdfIn PDF document text
    • http://blueduna.com/images/alone-battle-roytale-roblox-hacks-script-copy.pdfIn PDF document text
    • http://blueduna.com/images/free-bear-mask-roblox.pdfIn PDF document text
    • http://blueduna.com/images/robux-hack-february-2021.pdfIn PDF document text
    • http://blueduna.com/images/roblox-creepy-april-foools-hack-face.pdfIn PDF document text
    • http://blueduna.com/images/how-to-hack-yourself-on-roblox.pdfIn PDF document text
    • http://blueduna.com/images/hackaron-roblox-robux-hack.pdfIn PDF document text
    • http://blueduna.com/images/free-roblox-download-no-admind-password.pdfIn PDF document text
    • http://blueduna.com/images/comment-avoir-un-hacker-sur-jailbreak-roblox.pdfIn PDF document text
    • http://blueduna.com/images/obby-gives-you-free-robux-no-password-required-2021-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_off00003d49.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3D49 24664 bytes
SHA-256: 82759d5b5e3abfd3bda5426f42f57b46b2ef060f72aa4196a7b77556ada78e8f
font_01_sfnt_off000075fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75FA 18368 bytes
SHA-256: 2a49279defd6c7737e403c8bcf087157950faf059495b635547a2d9bd9b01270

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