Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4b6c8bb8f29a465…

MALICIOUS

PDF

44.7 KB Created: 2021-04-29 23:39:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 551fdb791cff7ab76df332301f82fb43 SHA-1: b0d9f8e32709a79cf1ac1bc3844f1b302214c684 SHA-256: c4b6c8bb8f29a465727882f2d018eadf87feea181ed6848dbe0468d865e31c6e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising game hacks and generators. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially harmful content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9863

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/como-usar-hacks-en-booga-booga-roblox-game-hack In PDF document text
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/easy-free-robux-2021.pdfIn PDF document text
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/addidas-tracsuit-roblox-for-free.pdfIn PDF document text
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/hack-apps-for-roblox-video-pc.pdfIn PDF document text
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-roblox-hair-for-avatar.pdfIn PDF document text
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-for-computer-nly.pdfIn PDF document text
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-using-game-guardian.pdfIn PDF document text
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-assasssain-in-roblox-youtube.pdfIn PDF document text
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-server-test-cheat.pdfIn PDF document text
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-roblox-robux-generator-2021.pdfIn PDF document text
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-com-today.pdfIn PDF document text
    • https://freerobux.cyouIn 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_off00004279.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4279 25720 bytes
SHA-256: 47e095b7aadd3f453a4d1fc7deddb2224674ed326b46b51e31d3ce279cf6ff09
font_01_sfnt_off00007e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E61 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00008b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B08 18916 bytes
SHA-256: 7cec74aa20830ed30578269a049530801a20218ae4fe12279823d2e5abae3b15

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