Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b532b5405ac9ec…

MALICIOUS

PDF

40.6 KB Created: 2021-04-30 10:01:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2720066eb7d4c5d0ce05c35dfc9476cc SHA-1: b4628b4f51ed8b97e0555a0733f51f8e710fe948 SHA-256: 91b532b5405ac9ec59905f706d8a9eab7251b0364ac26803c6df93cff2b21960
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free stuff' and 'game hacks' for Roblox, directing users to a suspicious URL. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to a malicious site, likely for phishing or malware distribution. The ML classifier also flagged this PDF as malicious.

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/free-stuff-in-roblox-games-game-hack PDF link annotation
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-get-free-robux-no-survey-or-download.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/free-roblox-for-roblox.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/cheat-scp-roblox.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-get-free-robux-without-hacking-2021.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/hack-roblox-prion-life.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/pinapple-outfit-hack-roblox-royale-high.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/groups-that-give-free-robux-2021.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-get-free-bc-in-roblox-pastebin.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/roblox-prison-life-20-hack-download.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-hack-your-friends-account-on-roblox.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000042f3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x42F3 24612 bytes
SHA-256: 7f91ecbf370ba1bdef1e36d4b01dff4a3b34e2cd9c67f50d0fb7f61fa06ef50f
font_01_sfnt_off00007b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B89 18680 bytes
SHA-256: 768b0e936da3bc4bc4df68ab7867edac179b32c608f5f8da002ae39f64a64d8d

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