Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca5e31da478a236a…

MALICIOUS

PDF

45.5 KB Created: 2021-05-13 01:56:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dcb68a67c0a9ea6dc19c156607832766 SHA-1: 8db5ab0ec689bb7e57f8fcef1bed307edacae7ef SHA-256: ca5e31da478a236a7f2c3291cc869a6d1b82db3f52b132ed0bfd98a51abac21a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to websites offering game hacks and generators, a common lure for phishing or malware distribution. The heuristic firings confirm the presence of malicious redirector links and a general lure for game-related cheats. No scripts were extracted, but the document body and heuristics strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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-apk-ios-download-game-hack In PDF document text
    • http://www.vista-design.hr/files/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • http://www.vista-design.hr/files/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vista-design.hr/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.vista-design.hr/files/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • https://www.vista-design.hr/files/robux-redeem_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.vista-design.hr/files/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vista-design.hr/files/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://www.vista-design.hr/files/claim-robux_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/roblox-robux_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://www.vista-design.hr/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/get-robux-com_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.vista-design.hr/files/robux-generator_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • http://www.vista-design.hr/files/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/vip-roblox-free_GM431946152.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
font_00_sfnt_off000047e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47E4 26744 bytes
SHA-256: 2140048c523e418c35a388eb270bec1482afe25a8b791ab412827eff720bd538
font_01_sfnt_off000084b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B7 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA2 18472 bytes
SHA-256: 0c4cab68c529531eb2b4d04ec138a4fc88ce066c8f2d87c6dc4b9eb8bdd1696f

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