Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb8373993044ee04…

MALICIOUS

PDF

34.9 KB Created: 2021-06-22 00:34:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8f1054a29a36096db29ecda839534a4e SHA-1: 5ff7781d775cac9ec65a163867a68da0481382af SHA-256: bb8373993044ee0467729861c814b15c4483358f357791400b2864d624bd479e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a prominent link to a 'game hack' website, identified by the PDF_GAME_HACK_REDIRECT_LURE heuristic. The document body and embedded URLs reinforce this theme, suggesting a social engineering lure to drive users to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a malicious intent to redirect users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://netcdn.co/app/431946152/hack-for-robux-2021-game-hack PDF link annotation
    • http://www.jsvillas.com.tw/assets/files/games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/pack-free-maps-roblox_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-coin-and-spin-link_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-robux-images_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-roblox-accounts-with-bc_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-coin-master-spins-blog_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
font_00_sfnt_off00002efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFD 22852 bytes
SHA-256: 7d5ab3fdfd7b216805f5bb397d07b80c30c19838fd0142571ca1f43594423f4f
font_01_sfnt_off00006274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6274 19288 bytes
SHA-256: e03bcb89b8f7495d0a2bbcb3adbb50414e4e6f0d56292bef5731b73c76904da6

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