Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef85fe928af7ac7c…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 18:54:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b0056ad2edadacca2cd71181c8917a83 SHA-1: 3f23352d2a612966dff047e63c09ff3bd6127edd SHA-256: ef85fe928af7ac7c999dcb2671fdad770960962f6945f015552994497a67b2cb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple links designed to lure the user into clicking on a 'free generator / game hack'. The primary link redirects to malicious infrastructure, indicating a phishing or scam attempt. The document body and embedded URLs suggest a focus on exploiting interest in game-related cheats, likely to deliver a secondary payload or lead to a credential harvesting site.

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.tw/app/431946152/block-best-robux-game-hack In PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-with-no-verifcation-surveys_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-hack-into-anyones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/easy-quick-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-fly-hack-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-robux-without-having-to-do-anything_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-free-the-feliciti-como-se-agacha_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/online-robux-hacks_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-map-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/cheat-roblox-lumber-tycoon-2-terbang_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-robux-hack-tool-download_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-cool-free-avatars-on-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/hilton-hotels-lua-c-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-create-free-vip-servers-scripting_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_off00002e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E52 22108 bytes
SHA-256: 679c9c77e769f9a77013f9911b6fceec17f2661e4167f77e4562abb6a9dea6a9
font_01_sfnt_off00005f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F43 18900 bytes
SHA-256: 23ffc9afa79f6964db2b60bd4774f276c737faf5613dfbf67615f79eab430b10

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