Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0a4c33aa52be27…

MALICIOUS

PDF

33.7 KB Created: 2021-07-04 15:49:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 39018c3898bc12fae80d11d5737af675 SHA-1: d70bee182f84c98c92ff0a87053274c9133377e0 SHA-256: 1e0a4c33aa52be2774fdfd8c0869b2dd28372e76eaea4e900d2b0bc6c97591cb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it links to known malicious redirector infrastructure, specifically advertising 'free generator / game hack' content. The embedded URL http://netcdn.tw/app/479516143/wurst-game-hack is a primary indicator of this malicious lure. While no scripts were explicitly extracted, the PDF structure and the nature of the link suggest an attempt to redirect users to a potentially harmful site, likely for further exploitation or malware delivery.

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/479516143/wurst-game-hack In PDF document text
    • https://library.fdk.ac.id/repository/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-what-to-do-when-hacked_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-free-limited-faces_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-games-that-give-you-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/fortnite-skins-free-for-roblox_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/get-free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-get-free-bugatti-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-frappe-hacks_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-hack-with-lucky-patcher_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_off00003081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3081 22224 bytes
SHA-256: fcccb7191dc194d85240663d89144e271de35f57f91febd8a814e0c1fdc27b56
font_01_sfnt_off000061ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AB 18072 bytes
SHA-256: bfe640fece8ec17f9f1aab4c59e3302c849608263b50329376eef2517c23199e

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