Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1ef7f2f6905f2d…

MALICIOUS

PDF

34.4 KB Created: 2021-07-09 07:29:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e172cbe708ae04307e714c46193feb5d SHA-1: 09b4c1c3eb6e5f90db06b53053416620b2327c01 SHA-256: 7e1ef7f2f6905f2d6217abd578f591bf2a105a3ebd9a004aa72809bb741f0c0f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures for popular games. The primary redirector URL is http://netcdn.tw/app/406889139/free-coins-coin-master-2021-game-hack. This indicates a phishing or scam attempt designed to lead users to potentially harmful content or further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/free-coins-coin-master-2021-game-hack In PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/earn-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-rewards-robux_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/roblox-games-to-play-for-free_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-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-robux-working_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-costume-roblox_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-get-free-robux-without-paying-for-it_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/roblox-shirt-hacker_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/roblox-free-gold-chain_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_off000030c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C7 22584 bytes
SHA-256: 431d13fd7d3b3f9ffb97e73485073e7f3354e7092d441aa8d1aeebe2e05890f2
font_01_sfnt_off00006331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6331 18400 bytes
SHA-256: 2a3e6040a3b782e95a9624477cdba266f2d22bc61ba2df799c05fa910d77e25c

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