Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c475d3ac78e2b56…

MALICIOUS

PDF

34.6 KB Created: 2021-06-28 19:40:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a26dcb7d0d645c9b3290483c9eccfcf0 SHA-1: 921fdab1d6273782a4f72519033750b3f6d0d83c SHA-256: 0c475d3ac78e2b56cf39a751885e3c6c9917c366dbfaee659aa2dce4670c7143
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 free game hacks and generators. The primary redirector URL is http://netcdn.co/app/431946152/fre-gamepasses-on-roblox-with-inspect-game-hack. This indicates a phishing or scam attempt designed to lure users to potentially harmful websites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a 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/fre-gamepasses-on-roblox-with-inspect-game-hack In PDF document text
    • http://library.ulb.ac.id//repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/pokemon-go-free-vs-pro_GM1094591345.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-cheat-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-witch-hat-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-free-items_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/mcpe-116_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/slurp-cheat-in-roblox-download_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/breaking-point-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hacker-game-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-roblox-game-apocalypse-rising_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-videos_GM431946152.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_off00002e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E19 22608 bytes
SHA-256: a2a39dce2393e38d17bbb97c199523066b7f4f798790df202e3b78ba6e9433d8
font_01_sfnt_off00006084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6084 19676 bytes
SHA-256: f2739495867c98830b8db1edb1303d9a7e45732c659e944be38093fb284f6dc0

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