Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cd0ac74c5afe1ac…

MALICIOUS

PDF

35.3 KB Created: 2021-06-18 01:59:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a329d5037c96f9548771ab5129374491 SHA-1: d3fa8ccb92aa98c7b613614af6596a578233cdf3 SHA-256: 4cd0ac74c5afe1aca25db9d69ea888a2b374b3c333e7b973ed771027068faace
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a lure for game hacks, specifically targeting Roblox, and embeds a link to a known malicious redirector. The ML classifier strongly indicates maliciousness. The embedded URL, http://netcdn.co/app/431946152/hack-an-account-on-roblox-game-hack, is the primary indicator of malicious activity, likely leading to further compromise or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/hack-an-account-on-roblox-game-hack In PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/itos-fun-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/easy-way-to-get-free-skirts-in-roblox-royale-high_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/earn-free-robux-now_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-robux-hack-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-the-conquerors-3-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/unlimited-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_off0000333f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x333F 22644 bytes
SHA-256: 4eb757fd9398e4f7b02ec4bd531980f8364269a6e2bda50c152e88e415babd40
font_01_sfnt_off000065cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CC 18712 bytes
SHA-256: f71d4bd163821756ca537de8e6014a12dfd526a85f769f893652c03966a5e811

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