Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a41310aee2e46ea…

MALICIOUS

PDF

41.9 KB Created: 2021-05-18 06:06:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7b8afcf08f26ea1e2499213a3aa3d6a2 SHA-1: aa247702731098c30142eace079eb8aac96e9b2d SHA-256: 1a41310aee2e46eaeb474d5ebc8f1b799f0fa04aea45a6c8971275825c2e71e7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious infrastructure, specifically promoting a 'Coin Master Hack'. The document body and heuristics indicate a lure for free game resources, which is a common social engineering tactic. No scripts were extracted, but the presence of malicious redirector links and the lure suggest the primary goal is to drive traffic to potentially harmful sites, likely for further exploitation or phishing.

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-hack-2021-no-human-verification-game-hack In PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-24-7-minecraft-server_GM479516143.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-free_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.thalanghospital.go.th/UserFiles/File/free-minecraft-java-edition_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_003_off00004964.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4964 24320 bytes
SHA-256: 93ba215ac4fd40b52827b4f7f7623e8fa41f62956da5cd920b9935bacece45ec
font_01_sfnt_off0000802d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x802D 18652 bytes
SHA-256: b8f105c40d85849bb980b8b1f3fc80cc73964bf3899fc8976168334accd52214

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