Malicious PDF — malware analysis report

Static analysis result for SHA-256 065a9f636e1c9479…

MALICIOUS

PDF

43.6 KB Created: 2021-05-10 16:32:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 415bd884c64d288e0eab66b8523f14c3 SHA-1: 6377a356d960f29d0758b1fa69efe9c22a916f0f SHA-256: 065a9f636e1c9479a2f09bcf4ed8064cf42dd70f421477326c281872e8413524
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, specifically pointing to the URL https://netcdn.xyz/app/431946152/how-to-get-free-robux-without-doing-anything-game-hack. The document body, though partially corrupted, also contains this URL and references 'free robux', reinforcing the lure. This suggests the document is designed to trick users into visiting a malicious site, likely to download further malware or engage in phishing. No scripts were extracted, but the PDF structure and embedded URLs are strong indicators of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://netcdn.xyz/app/431946152/how-to-get-free-robux-without-doing-anything-game-hack PDF link annotation
    • https://www.san-ben.com.tw/upload/files/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/roblox-generator_GM431946152.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/coin-master-coins_GM406889139.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • https://www.san-ben.com.tw/upload/files/minecraft-bedrock-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_off000048cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48CD 26192 bytes
SHA-256: 27fd27f69b854444a02c82b1a9c0da5162bdf5b3298c9d02d47befa212bbab80
font_01_sfnt_off00008516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8516 19400 bytes
SHA-256: 843e7c6de0628ecb74dfde19cdfb212261a67f0d6d996bc16e2547f6c0bce3d3

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