Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c973c2bb3bc1597…

MALICIOUS

PDF

43.4 KB Created: 2021-04-30 11:14:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 86f703823bd293c4a6bb3acdc37b56ff SHA-1: b5b106bcd74c575b494d8e3502df2ab850e4b207 SHA-256: 1c973c2bb3bc1597e2f3ae7daf4062672bd718ddbfe9c25e27c8a1fdcdab15d4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a "Roblox Unlimited FPS Hack" which redirects to a malicious URL. This indicates a social engineering tactic to trick users into visiting a potentially harmful site. The ML classifier also flagged this PDF as malicious, increasing confidence in its malicious intent. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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-unlimited-fps-hack-game-hack PDF link annotation
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/cheat-roblox-mad-city-2021.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/checkmein-free-roblox.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/delta-lite-roblox-hack.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/client-cheat-roblox.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/is-it-hacking-if-i-use-autoclicker-in-roblox.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/free-robux-urban.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/150-robux-free.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/comment-hacker-pour-avoir-des-robux.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-get-free-robux-no-survey-or-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_off00003f24.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F24 24716 bytes
SHA-256: 1b95151811dc5492a62de38defcdc4076b1d13dc144cd6eea0a7fcbf99b05ec1
font_01_sfnt_off000077e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E3 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000848b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x848B 19364 bytes
SHA-256: 10dfe684f9319e45891f6a177b6b20dcd5f0cd1dac38e5444394faa0aeca36c8

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