Malicious PDF — malware analysis report

Static analysis result for SHA-256 501361ee50b5a044…

MALICIOUS

PDF

33.9 KB Created: 2021-07-02 03:44:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 33f55b1479d48cb4565884ae4464e6fe SHA-1: 4db454e2533b1281b86bdaf29aa46cbe35e17457 SHA-256: 501361ee50b5a0443871459e4de6fe69b331b2c20853743a9ccc0c00a4f48d3f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a malicious redirector, disguised as generators for in-game items. The primary lure is 'How To Make A Free Shirt In Roblox 2021', directing users to 'http://netcdn.co/app/431946152/how-to-make-a-free-shirt-in-roblox-2021-game-hack'. This pattern suggests a phishing or scam attempt designed to trick users into visiting malicious sites. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate malicious intent.

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/how-to-make-a-free-shirt-in-roblox-2021-game-hack In PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-level-7-script-for-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/download-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-roblox-shirts-funny_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/microsoft-bing-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-uber-roblox-id_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-roblox-welcome-to-farmvil-vip-links_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-hack-2021-apk_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-free-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/cheat-roblox-shark-bite_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/stock-speed-coin-master-free-spins_GM406889139.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
font_00_sfnt_off00002f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F42 20996 bytes
SHA-256: 4125dacb95873c23d75da9cdcee229b1f2ee96a3dc77a5abeeeb181c0e73dca5
font_01_sfnt_off00005ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE7 19972 bytes
SHA-256: b3f67daa848f0aaa601511aead8291bb36b4cdf1a0988ab9a70451a9c6531c9c

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