Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c44f0a12717510…

MALICIOUS

PDF

40.8 KB Created: 2021-04-23 18:08:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 37e794dffd29130f3b36e515c6d94f9c SHA-1: 1ac8080d420e4f9d73e9c626295dd3a0bdd51790 SHA-256: c0c44f0a1271751018f3e60e01d40e7528f2c5fd1617a2d16929165c0567e72c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a "game hack" generator, which is a common lure for malicious downloads or phishing. The heuristic firings, particularly PDF_GAME_HACK_REDIRECT_LURE and ML_NYX_PDF_MALICIOUS, strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure itself facilitates the redirection to the malicious URL, likely serving as an initial lure in a spearphishing campaign.

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.
  • 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://netsecure.top/app/431946152/hack-robux-no-inspect-game-hack PDF link annotation
    • https://www.dotnotion.com/uploaded_files/userfiles/files/how-to-hack-your-health-on-roblox.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/fre-sha-vaca-do-roblox-id.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/greenville-roblox-hacks.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/roblox-paid-hack.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/roblox-download-for-windows-7-free.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/bouton-free-robux.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/2021-free-robux-no-website-2021.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/shark-roblox-hack.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/how-to-get-free-robux-buy-inspecting.pdfIn PDF document text
    • https://www.dotnotion.com/uploaded_files/userfiles/files/goku-free-cloth-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_off00004036.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4036 25968 bytes
SHA-256: 87ddf3ed35727e28fdf3a80dec89bbfbd4594561645478f6e91175a5fb24e123
font_01_sfnt_off00007cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB4 18528 bytes
SHA-256: cf880ecd39aff207cb1b238f0f093eaeb9948ad9f2aae755f042edbcc79fb25d

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