Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45872e7f8c22703…

MALICIOUS

PDF

50.1 KB Created: 2021-06-11 01:10:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 78b86942c7330a67ceecd4d51279e7fa SHA-1: 06d802b1a16430d42acb838ce443178ce0576bab SHA-256: e45872e7f8c22703ea8c81e84b88840c22e9457a76aa27e9771ff9e9021b858e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links to malicious redirectors, specifically promoting 'game hacks' and 'free generators' to entice users. The document body and extracted URLs suggest a lure for potentially unwanted software or further malicious downloads. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow, likely leading to a second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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/admin-hack-script-roblox-game-hack In PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-free-followers_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-on-ipad-mini-4_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-tik-tok-2021_GM835599320.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-murder-mystery-2-modded-free-admin_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-dungeon-quest-money-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/cheat-roblox-lumber-tyccon-fly_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-remy-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ff7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FF7 34660 bytes
SHA-256: 84492cac484eeac83f911a7e31662954d955fe2cece6d26f460343c8039e8a23
font_01_sfnt_off00009f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F3F 19016 bytes
SHA-256: d35c64b955eec65a8cd77cdd7295fce8b9ac577b198d5004dd5c0665d5399226

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