Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e33e7818a75e657…

MALICIOUS

PDF

46.1 KB Created: 2021-06-09 04:48:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 83cc52c8898ee0d1aafda9166a6ea3f9 SHA-1: 247dc75611aa2f799afa9815394c48e84a1954ee SHA-256: 4e33e7818a75e657d8277884048e9fe18e91701018e1a9e6dbd9421e82c17dc4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free Robux and game hacks, directing users to external URLs. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URIs suggests an attempt to redirect users to malicious sites for further exploitation. While no scripts were explicitly extracted, the document's structure and embedded URIs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/free-robux-no-human-verification-2021-game-hack In PDF document text
    • https://library.stikeswnpalu.ac.id/repository/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/pokemon-go-free-box_GM1094591345.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-skins-free-download-girl_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/wurst_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/master-coin-hack_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-daily-free-spins-link_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
stream_004_off000050f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F6 27076 bytes
SHA-256: 9b51ac6b220ae68bc2c405f092751d8f124a0efd6d30b749709471966cf14d2d
font_01_sfnt_off00008eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EB0 19260 bytes
SHA-256: 6a9b2633b50d097f4b127a07737bc979a0fc1726e0f4efc9f53c1be2676c3116

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