Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef84a32d2c2b030d…

MALICIOUS

PDF

34.6 KB Created: 2021-07-21 14:46:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 916b93c85705c1d0fc184769edad0985 SHA-1: 54ec33f4d51a0823bd9d4df98b524b0e2b45a862 SHA-256: ef84a32d2c2b030d23c351ae4df7a5e50a41496b8f1c09cc309891cdcd1593a7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/coin-master-free-link-game-hack. The document body text and embedded links suggest a lure for game-related cheats or generators, likely intended to lead the user to download a malicious payload. No scripts were extracted, but the PDF structure and embedded URLs indicate a malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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-link-game-hack In PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.angelsbasket.com/uploaded_files/userfiles/files/minecraft-server-hacks_GM479516143.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_off00003158.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3158 23512 bytes
SHA-256: 0c41417c45fdec19af181168f33b418216dff9764f78c5dc137736ae5df72647
font_01_sfnt_off000066a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66A2 17880 bytes
SHA-256: 5ce88b684446e36e89a0643934549b22fce1d776877bbe9d9a558feafde7429d

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