Malicious PDF — malware analysis report

Static analysis result for SHA-256 447dcc28b2114a79…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 01:35:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9adcd929036e14d034e2cafcf5c049d6 SHA-1: 645d6d526eaee8cbcecd92a3c49a227428671084 SHA-256: 447dcc28b2114a7911b0b28cc66cacf613dd382ec7701be56789c76b547acbe1
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free spins'. The document body and heuristics indicate a lure to download or access potentially unwanted or malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit user interest in game cheats to redirect them to malicious sites.

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/coin-master-free-spin-and-coins-links-home-game-hack In PDF document text
    • http://librarysenior.com//repository/roblox-pics_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/more-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/omo-recuperar-una-uenga-hacker-en-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/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_002_off0000303d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x303D 23096 bytes
SHA-256: 5e6424c14aac89cd65ae778798f08887cc0c0f4bc0b1879827492885d67464f7
font_01_sfnt_off0000644b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644B 18776 bytes
SHA-256: beab0249627af8b25f328c38e932316e8f6bf49274584d4d61a4535d90c97bb2

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