Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f208eb2ae0b4d19…

MALICIOUS

PDF

42.2 KB Created: 2021-05-04 14:20:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e4e133056b6e24f3048cd7c21b60849a SHA-1: df92dbf823e818a8a7058147d2a9e439737aa0c4 SHA-256: 0f208eb2ae0b4d19a00aab3017002fd1ed143105b63644df53dffb930f738577
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, specifically promoting 'Roblox Hack Injector Dll' content. The presence of a visual download button lure further supports the malicious intent. While no scripts were directly extracted, the PDF structure and embedded links strongly indicate a phishing or social engineering attempt to redirect users to a malicious site.

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/roblox-hack-injector-dll-game-hack In PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-get-roblox-on-xbox-360-for-free.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-become-a-admin-in-roblox-no-hacks.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/blue-hacks-team-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-boys-shirts-roblox-codes.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/dll-hack-for-roblox-2021.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-human-verification-on-pc.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-robux-codes-pc.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/all-about-me-robux-free.pdfIn PDF document text
    • http://technibuild-group.com/uploaded_files/userfiles/files/roblox-online-roblox-hack.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/dreadguard-roblox-hack.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_off00004492.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4492 28060 bytes
SHA-256: 7e526324fb402516c26b906193337c3e1c5ec1e32257b03c2a6a320ad8be20af
font_01_sfnt_off00008238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8238 18640 bytes
SHA-256: 5532f5c9635d4a91d8e0f4d83b4b5ee21e358d3cf8b4215b6ba1d50986f87244