Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f135fcfe8d26d54…

MALICIOUS

PDF

41.2 KB Created: 2021-05-16 17:40:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2bf8a9aa1e45bdc1c13f4f4a5d905003 SHA-1: e8d568e0c41487796f39beb30e212668766543f8 SHA-256: 6f135fcfe8d26d543fd4ead0881a1db253bbe3f4c464b933512105d4c94f8d6b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, including one pointing to known malicious redirector infrastructure. The document body and heuristics indicate a lure for 'game hacks' and 'free spins' to trick users into clicking the malicious link. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-free-spins-and-cards-game-hack In PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coins-master_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-rewards-app_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_003_off0000493d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x493D 23840 bytes
SHA-256: b6f4d3c058d57d7ce8061c06463df8579d3a7ba9d0eccbe9b071e03b9581e70a
font_01_sfnt_off00007f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3E 18060 bytes
SHA-256: 7f8980b6f3213b204c7b050e62c653166806b65682437d624869b2fc7a4cb6a7

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