Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b78b0e9437dbb41…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 07:39:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7a49d6fa028a99d700ec27b4cb12258d SHA-1: d8de336d8872aa5d4a7212b8dd6850dea841fcb1 SHA-256: 7b78b0e9437dbb41838f3ef3f2fac91b779011f5b5579637e4b1f1fd913c0e8a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to game hacks and free generators to entice users to click on embedded links. The primary link, http://netcdn.tw/app/406889139/freespinandcoin-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit vulnerabilities or redirect users to malicious sites, likely for further payload delivery or phishing.

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/406889139/freespinandcoin-game-hack In PDF document text
    • http://library.umuslim.ac.id//repository/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-auto-clicker-for-mac-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-infinite-robux-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/ash-shirt-only-the-free-ones-on-roblox-shopping_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-do-you-hack-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-roblox-ames_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-hack-a-draw-it-server-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-custom-script-executor-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-cheat-on-dragon-ball-rage-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/apocalypse-rising-roblox-mac-hack_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-cheat-engine-walk-through-walls-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-hack-and-get-free-robux_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
font_00_sfnt_off0000321d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321D 22644 bytes
SHA-256: 1c97acb365953e9d0a751f0e29d864589ef659ec1dbedf4c3c7da76a88118936
font_01_sfnt_off000064f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F7 18244 bytes
SHA-256: 19494bed36003fadbe02431e250c62ef1698fa422030438aed600d934fd3a9e1

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