Malicious PDF — malware analysis report

Static analysis result for SHA-256 b40b4699f063547e…

MALICIOUS

PDF

37.7 KB Created: 2021-07-05 02:51:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 19d5aabf4fd9aecdcee778d202e04161 SHA-1: d5ed23cbe4d6913bde4396c344c9f539c31ab418 SHA-256: b40b4699f063547e3d7283b3ccedb82388338310f133d8bba0922b4fd63a16b6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The embedded URLs and the document's content strongly suggest a phishing or scam attempt designed to trick users into visiting potentially harmful sites. While no scripts were extracted, the PDF's structure and heuristic firings indicate a malicious redirector workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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/free-robux-and-tickets-generator-2021-game-hack In PDF document text
    • http://digilib-ppsunisma.ac.id/repository/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/hacks-on-roblox-build-a-boat-for-treasure_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/hack-mod-roblox-apk_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/mangocheats-com-hack-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-hack-co_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/hacker-roblox-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/hack-gratis-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/innovation-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-do-you-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/exploit-cheat-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-hack-roblox-with-winrar-on-windows-10_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/best-roblox-free-skins_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/hacked-roblox-servers-flamingo_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-prison-lifewall-hacking-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-girl-pants-ids-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/robux-for-offers_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3CAE 21976 bytes
SHA-256: a92d25fc04d69427105ce8ed2ee7bf3c6042def5c07a7aff5150b50997367598
font_01_sfnt_off00006d0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0A 19500 bytes
SHA-256: f362d7c80fadc1dc16fdca297e28a286f40af31aeddc9f1a44a7e3af71f2d0bd

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