Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ece4cfdbd5c041a…

MALICIOUS

PDF

43.4 KB Created: 2021-05-11 20:35:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 00e36cdd5dbda9fc69478323e4c45ebf SHA-1: 9ede4900f4b52223715043993a3c1ce62ae4f55f SHA-256: 5ece4cfdbd5c041aee21b94dbc50458e58444859b424381b0dc3f8416ae607a5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising free Robux and game hacks. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs and the document body content strongly suggest a phishing or scam attempt designed to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/free-robux-games-that-actually-work-2021-game-hack In PDF document text
    • http://dialine.cz/images/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • http://dialine.cz/images/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://dialine.cz/images/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://dialine.cz/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
    • http://dialine.cz/images/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • http://dialine.cz/images/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://dialine.cz/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • http://dialine.cz/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://dialine.cz/images/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://dialine.cz/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://dialine.cz/images/how-to-get-free-robux-easy-no-download_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
stream_003_off000048ee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48EE 25760 bytes
SHA-256: 758acc0137096e2053014743a1c07fd8aa271222ac350d995baa820b8b1d02c8
font_01_sfnt_off000082d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D3 19796 bytes
SHA-256: 825df7cf396e8d9c124972fb8483e304b72a256d7e3507e7d5ad5df48b88867f

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