Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd4e390ac70f618…

MALICIOUS

PDF

51.0 KB Created: 2021-06-10 22:47:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1d934231db9741fe3a8d23639562e500 SHA-1: b2d26b22df45927cb96288dc5090b8ed0cf27b9d SHA-256: 6cd4e390ac70f6185eda72717bdb0b7a0eee1b623cdd92a2021f0b90b1c9fac9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free generator / game hack' lures. The embedded URLs and heuristic firings strongly indicate a social engineering attempt to drive users to malicious websites. No scripts were extracted, but the presence of numerous redirector links suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

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.tw/app/431946152/real-free-stuff-roblox-game-hack In PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-robux-with-inspect-element-2021_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/tiktok-free-view-iphone-video_GM835599320.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/roblox-cheat-codes-for-dragon-ball-z-rage-2021_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/hack-para-tener-robux-en-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f89.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F89 25388 bytes
SHA-256: 9e90075be5e81e39157a71067768c8bd7af566c2dcce7631caa6c7971793f1c9
font_01_sfnt_off00008993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8993 8132 bytes
SHA-256: e6d68e720ea5acf9dccbf7ffde18db6f65c62a99ab7725aa43e30329033a7787
font_02_sfnt_off0000a480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA480 18420 bytes
SHA-256: 02f978929d22dd14fd5dd57e1ac5825b7cbc36001c5a73cfadf8015193e0d1f4

Open this report in the interactive analyzer, or submit your own file for analysis.