Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9f501f6b0ba712a…

MALICIOUS

PDF

35.0 KB Created: 2021-06-25 17:01:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d2344979509194944d768dd1c606bbbf SHA-1: 2ea12462ce5fc07dfdae55ed1b9bc008baf6d7ac SHA-256: e9f501f6b0ba712add34fe7bded7ddf48f130576f3036f9a0707b94ecd6145cb
180 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating a malicious redirector link disguised as a 'free generator / game hack' for Roblox. The document body and embedded URLs reinforce this lure, directing users to potentially malicious sites. The malformed stream length suggests an attempt to obscure malicious content, likely related to exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-roblox-oder-accounts-game-hack In PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/boys-hair-roblox-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-without-human-verification-android_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-skin-codes-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-earn-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/youyube-how-to-get-free-robux-that-working_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-admin-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-see-roblox-shirts-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-free-robux-quick-and-easy-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-live-yt_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-avatar-roblox-girl_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-site-better-then-irobux_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/medieval-hood-of-mystery-roblox-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/pastebin-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-promo-codes-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-username-change-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/best-free-buildings-in-roblox-studio_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_off00003067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3067 22964 bytes
SHA-256: 6d197cdb0553cb5c331459682caa4856ea6efa57007c362960f886c13e6e45dd
font_01_sfnt_off000063d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D6 19068 bytes
SHA-256: 81d423d25f00b1753db5efd5aff4933da513934a0034132e493c95a9d9cc46c4

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