Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d194389a354fb29…

MALICIOUS

PDF

50.6 KB Created: 2021-06-09 02:35:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d8513dc781f63858082738fd2d3497f2 SHA-1: 94d105814599f1e00aeadcc2911696b39a1e25df SHA-256: 0d194389a354fb29cdc79f5347616e27f5c4e3bfc0a87eb05c4fa2901e0d5ba5
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malformed stream and links to known malicious redirector infrastructure, specifically a lure for a "free generator / game hack". The embedded URL https://netcdn.tw/app/431946152/comment-hacker-roblox-accesoir-game-hack is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and malicious links suggest an attempt to redirect the user to a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9779

Heuristics 5

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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.tw/app/431946152/comment-hacker-roblox-accesoir-game-hack In PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/how-to-get-free-robux-apple-ipad_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/v3rmillion-free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/acop-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-camera-plugin-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/how-to-hack-counter-blox-roblox-offensive_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/minecraft-free-download_GM479516143.pdfIn 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
font_00_sfnt_off0000538f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x538F 30124 bytes
SHA-256: dc7d0b33376f390a143f3833d1aed8d212ca1166ffeaabc45f4091874b78ff54
font_01_sfnt_off00009893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9893 2872 bytes
SHA-256: 5a38050e56bfed6ba013c4835499ae05f4b57b22e606c9172dd4bc2ae7fd1207
font_02_sfnt_off0000a24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA24E 18664 bytes
SHA-256: e71d56d03b85f2eeff11d62ce90d307fb0a7e8685c76725c82c1239490e9d54f

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