Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ecffc20a11c8dc…

MALICIOUS

PDF

41.0 KB Created: 2021-04-30 11:14:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e3b933ac92585d05f26123ea104028cd SHA-1: 379a3bc17c12e85d6005d878a328d8fe9c8ab2a8 SHA-256: b0ecffc20a11c8dcd8385dd0e05ae3f4c049ceb0580316f3bf635e6bf4ec0acf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure, designed to trick users into downloading further malicious content. The document body and embedded URLs suggest a lure related to 'game hacks' for Roblox. While no scripts were directly extracted, the presence of embedded URLs and the nature of the lure indicate a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/hack-de-cuentas-de-roblox-game-hack In PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/hacking-my-roomates-roblox-account.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/robux-hack-no-human-verification-2021.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/btools-hack-roblox-free.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/free-robux-no-virus-hax-free.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/cheating-in-boku-no-roblox.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/google-how-do-i-get-free-robux-on-roblox.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/wall-hacks-for-roblox.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/free-robux-obby-limited-time-only-2021.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/roblox-cheat-codes-for-robux-2021.pdfIn PDF document text
    • https://www.malesse.com/ckfinder/userfiles/files/how-to-hack-on-xbox-one-roblox.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000428e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x428E 26360 bytes
SHA-256: cbc004cb6bf8fb6462785677d884d0fe818e6041a2147d180ff947e0f7337118
font_01_sfnt_off00007d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5E 18592 bytes
SHA-256: 826a172094998ebc02c8b163191c3fa27c2856cbadc9b32847330cf40196e227

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