Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c4579a20e1697a…

MALICIOUS

PDF

33.1 KB Created: 2021-06-28 10:03:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 24918f319bfea8abc16024df108b0c4d SHA-1: be4b88823234a082523ac9d5631d4ae50b571630 SHA-256: a8c4579a20e1697a74567ed7047585fb872702f476a6d846053e48ad51f86256
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link to a known malicious redirector, http://netcdn.co/app/431946152/hack-site-roblox.com-robus-game-hack, which likely leads to a site offering game-related cheats or exploits. The presence of a visual download button and the ML classifier's high confidence score further support a malicious intent. No scripts were extracted, but the embedded URL and document content suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 3

  • 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 http://netcdn.co/app/431946152/hack-site-roblox.com-robus-game-hack In PDF document text
    • https://bkpsdm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://bkpsdm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://bkpsdm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-card-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://bkpsdm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://bkpsdm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • https://bkpsdm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/freespins-coin-master_GM406889139.pdfIn PDF document text
    • https://bkpsdm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://bkpsdm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://bkpsdm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://bkpsdm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-legit-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://bkpsdm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • https://bkpsdm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://bkpsdm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-roblox-friends_GM431946152.pdfIn PDF document text
    • https://bkpsdm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://bkpsdm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • https://bkpsdm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://bkpsdm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/tiktok-free-7-day_GM835599320.pdfIn PDF document text
    • https://bkpsdm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • https://bkpsdm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://bkpsdm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB8 21492 bytes
SHA-256: 81f518e3674a6399ba6158d923806f7f9b7ecf296bdafed38df61fce143c4a35
font_01_sfnt_off00005bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD1 19344 bytes
SHA-256: 31455318d6798179b93c1633bea06f2b048bce9b2e7c66043674d1841fc887bd

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