Malicious PDF — malware analysis report

Static analysis result for SHA-256 c50a9eeed64251f2…

MALICIOUS

PDF

43.0 KB Created: 2021-05-13 19:39:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 829609422be77e8ed2dfdcab6d9570be SHA-1: 63d65af20b2234b220d372c2376ba4f47118d798 SHA-256: c50a9eeed64251f241054f75acd063257331260a33a027423ba590a8161228be
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, disguised as game hacks and free spin generators. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and 'PDF_MALICIOUS_REDIRECTOR_LINK' strongly indicate a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for JavaScript execution or redirection to malicious content.

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/406889139/40-free-spins-coin-master-game-hack In PDF document text
    • http://www.sapaengineering.kz/images/mcpe-optifine_GM479516143.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/mcpe-download_GM479516143.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/coin-master-hack-iosgods_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://www.sapaengineering.kz/images/minecraft-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ecc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ECC 24608 bytes
SHA-256: bc21b3fa5da74e89117603c253a9826c985badc4d3d43dfdd627961f0d396905
font_01_sfnt_off00008647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8647 18120 bytes
SHA-256: adc3b494d1fa0974f6acdf3c8a88f4cec1eca3c3c07b4c24b7a089c53791e33f

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