Malicious PDF — malware analysis report

Static analysis result for SHA-256 4225b74c334642f2…

MALICIOUS

PDF

42.4 KB Created: 2021-05-11 23:35:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bd59a6985f5323b984fb9120efd6d7a6 SHA-1: 6c3ad2b10a2cb66fb5c484b371d7d91e033cd8e6 SHA-256: 4225b74c334642f20f576f59b653525439d10bb921d713fcbe87c35e9f104e9d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising "free generators" and "game hacks" for popular games. The primary redirector URL is https://netcdn.xyz/app/406889139/coin-master-free-soins-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector workflow, likely intended to lead users to phishing or malware download sites. The document body contains obfuscated text and URLs, further supporting this malicious intent.

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-free-soins-game-hack In PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/robux-in_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-character-free_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/robux-come_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/robux-apk_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-gold-cards-free-link_GM406889139.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_off00004d41.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D41 24592 bytes
SHA-256: dfe76d8562bece7b16b5e30a392726141221a3ce25e49bef0785b93a271243b9
font_01_sfnt_off00008541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8541 17712 bytes
SHA-256: a621fa0cf6ecf429ccb0e9762dad0d1971a2824e8730eca88621f5efe7e14995

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