Malicious PDF — malware analysis report

Static analysis result for SHA-256 63cdac4b96b33522…

MALICIOUS

PDF

46.1 KB Created: 2021-04-29 21:42:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 07b83a68a764f99c037a494625c1224f SHA-1: dddc78547385e6540429d2d23bb47e57086b1ce1 SHA-256: 63cdac4b96b33522d05d69bbf1511bebde54eb0be9b28b1fa3baac27e177e905
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as "free generator / game hack" lures. The document body explicitly contains a call to action to access a Roblox generator, reinforcing the phishing pretext. While no scripts were directly extracted, the PDF structure and embedded URLs strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9776

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/free-codes-assassin-roblox-game-hack In PDF document text
    • https://lib.stie-yai.ac.id/repository/google-how-do-you-get-free-robux.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-roblox-exploits-mobile.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-hack-on-roblox-in-3.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/eran-robux-free-robux-vrobux-com.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/youtube-free-robux-codes-urban420.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/does-robux-hacknet-work.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-free-download.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-and-tix-generator-no-download.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-rich-account-roblox-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-make-a-free-robux-website.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004300.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4300 29068 bytes
SHA-256: 1fe7b23ee895539efdf1a78bad7c236d5cfcf7bb2890b20253a02dcf20446bef
font_01_sfnt_off00008525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8525 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off000091cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91CD 18472 bytes
SHA-256: 3bdb25894e5302ac226d2749071d3dd09191ce592c7a6bcee604908e2be92163

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