Malicious PDF — malware analysis report

Static analysis result for SHA-256 de588f239a7942c3…

MALICIOUS

PDF

35.1 KB Created: 2021-07-01 16:45:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 36cb3b677c9fb3b02de9d688c09cea07 SHA-1: cac6c7d45e321650684e5ef941ffbde7e0b4f2da SHA-256: de588f239a7942c3de67468eda866977cc6dd0fc6cb11465583c10ec450253c9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks, specifically for Roblox, directing users to a suspicious URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or phishing sites. No scripts were extracted, but the document's structure and embedded links strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/hack-scritp-inputter-for-roblox-hacks-game-hack PDF link annotation
    • https://zustsearch.com/uploaded_files/userfiles/files/hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/getrobux-now_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/how-to-get-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/roblox-health-hack-2021_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/free-super-happy-face-roblox_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/rbx-sites_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/hack-download_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-kindle-fire_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/how-do-u-get-free-robux-witout-payig_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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
font_00_sfnt_off0000321d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321D 22240 bytes
SHA-256: 95c74a9481509a28cd5d5ebc489e9ca692d46b64f2bb5751ac07bcddee7f995a
font_01_sfnt_off0000635c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635C 19360 bytes
SHA-256: 3f1b8c04d178ba9aa1b4c3cd2c81e444f41ae4c339ee48382912a4a739f42567

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