Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c54a97c835b0f40…

MALICIOUS

PDF

44.2 KB Created: 2021-04-29 22:09:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 38bdd28778b5005c8d686a447675cccb SHA-1: b4d7c114659ea77621bc07ba44a38a87aba87bb0 SHA-256: 3c54a97c835b0f40e962443f9236ef39bf41e24354cab0b7e73189605a2277c5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary lure pointing to a 'game hack' generator. This suggests the document is designed to trick users into visiting a site that likely hosts malware or phishing content. The ML classifier also flagged this PDF as malicious, increasing confidence in this assessment.

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-dungeon-quest-hacks-game-hack PDF link annotation
    • https://www.malesse.com/ckfinder/userfiles/files/descargar-hack-pc-robux.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/free-robux-on-ipad-pro.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/free-roblox-1b-roblox-accounts.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/free-roblox-accounts-with-robux-list.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/silent-assassin-cheats-roblox.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/no-virus-hack-roblox.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/descargar-roblox-hackeado-para-pc.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/free-robux-generator-no-human-verification-or-password.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/clone-army-free-roblox.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/roblox-how-to-get-free-hats.pdfIn PDF document text
    • https://freerobux.cyouIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004237.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4237 26228 bytes
SHA-256: c6dca60e78d05ec2e57f548635278892507c8d3bf48e405e721d1e43fe81b1e8
font_01_sfnt_off00007e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E94 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00008855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8855 19040 bytes
SHA-256: 9815c5c91c317da4a723ee85f7a8bb6d6527eb0dd30de5717071de9463892ce0

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