Malicious PDF — malware analysis report

Static analysis result for SHA-256 832966711f3050b4…

MALICIOUS

PDF

43.4 KB Created: 2021-05-15 03:01:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 12d9064a677cf4ab30d3f7e12f82968a SHA-1: 71309c33b0338ffd5455fb3a8d89546b96c22e61 SHA-256: 832966711f3050b457b91ee90f1f536b17bca3e0292d5deeb342c2b46886bbdf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a primary link identified as a malicious redirector. The document body and embedded links suggest a lure for game-related cheats or currency, such as 'Robux', which is a common tactic for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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/get-robux-today-game-hack In PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/minecraft-pe-mod-menu_GM479516143.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-game-hack-app-download_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/robux-free-online_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_off00004a21.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A21 25724 bytes
SHA-256: d7bf8bf21066f0a46dfcaf8b08fe4406154a2fb6da1c7697e50c4ff1e265ea57
font_01_sfnt_off00008662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8662 18536 bytes
SHA-256: 52f9c859b3f332441204d5c114ca3069b0f0b255dc0376a71d348f06f556bd46

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