Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cba25b23eb52697…

MALICIOUS

PDF

35.9 KB Created: 2021-07-04 07:10:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: db36207be830e1dd427280e36866d181 SHA-1: 2497c79bc8a3b4becbac12abf3fece4ac5750e91 SHA-256: 3cba25b23eb526970b03660a95ef1651eeed732a4745f8ea42fef9e21016aa41
160 Risk Score

Malware Insights

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

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/coin-master-spin-link-today-2021-game-hack. This redirector is likely used to deliver a second-stage payload or phish for user credentials. The document body and embedded links suggest a lure related to game hacks and free in-game currency, a common social engineering tactic.

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-spin-link-today-2021-game-hack In PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/rbx-hut_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/get-robux-for-freecom-on-computrt-2021_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/how-to-get-admin-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/robux-offers_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/roblox-superhero-package-free_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/free-card-codes-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/hack-de-juegos-apk-robux_GM431946152.pdfIn PDF document text
    • http://www.mondecasa.com/Public/upload/editorfiles/hack-to-get-robux-2021_GM431946152.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
font_00_sfnt_off00003511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3511 22604 bytes
SHA-256: c3251bb69b7ea63e09aba074d9be29cbfa24b92c992d2baabed8faef59bb03b4
font_01_sfnt_off0000677d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x677D 18936 bytes
SHA-256: aefd4c8aa672ac6796493a30dc30ef33cbc4fc7ade9b0201b27009014c0c0cd8

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