Malicious PDF — malware analysis report

Static analysis result for SHA-256 edffe97524af9f0b…

MALICIOUS

PDF

44.4 KB Created: 2021-05-01 01:52:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3fc9b7c57cae87e13d068510908fb805 SHA-1: 8bc83feee8cd720c5ef6cbcced2e9c7b66111600 SHA-256: edffe97524af9f0bdb9922c459f15d628ec5304fb0f96f626eb1fed458fcf5c8
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 0.9863

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/roblox-weight-lifting-simulator-hack-to-get-super-strong-game-hack PDF link annotation
    • https://freerobux.cyouIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-tattoo-group-roblox.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/roblox-how-to-get-free-clothes-on-ipad.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/roblox-robux-hack-generator-no-survey.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/how-to-be-a-free-admin-on-roblox.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-robux-obbys-may-2021.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/1-robux-every-second-hack-robuxian.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/free-mode-menu-works-roblox.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/roblox-royale-high-diamond-hack-no-human-verification.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/couleur-de-peau-free-roblox.pdfIn PDF document text
    • https://kultura.orb.ru/uploads/ckfinder/userfiles/files/roblox-jailbreak-cheats-download.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004416.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4416 24084 bytes
SHA-256: da4400b236b1227d95bb17d34b0d1605061aff1a3eb3365009679b6a1a1c48de
font_01_sfnt_off00007b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1C 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off000087c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87C3 19636 bytes
SHA-256: ea3360e16d9be8c8379bae08e9e8526cb118445565c0aba2b352ca53686bfce5

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