Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e244fdcd812e717…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 19:37:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 46437bbe44363a69f5791859dc365e27 SHA-1: f499b95e1945a4a1556980caf2a873f94bcce164 SHA-256: 2e244fdcd812e7172343fce0f129e6467ae6a7e4aa71ae35706599079c1db9a9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector at http://netcdn.tw/app/479516143/is-minecraft-free-on-mac-game-hack. The document body and extracted URLs suggest a lure related to game hacks and free currency, a common phishing tactic. While no scripts were explicitly extracted, the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of this document being used to redirect users to potentially harmful content or initiate further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/is-minecraft-free-on-mac-game-hack In PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/hack-para-roblox-comandos-2021_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/roblox-hacks-2021-epic-minigames_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/codigos-paa-hackear-roblox_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/robux-2021_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-tiktok-app_GM835599320.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/roblox-pokemon-go-2-cheats_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/how-to-get-free-stuff-on-roblox-ipad_GM431946152.pdfIn PDF document text
    • https://bioscience.kyst.com.tw/image/data/files/roblox-source_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
font_00_sfnt_off00003149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3149 22464 bytes
SHA-256: 25143914e7e12e9ff5927eab0d3f411ac737aa1072a5412b620652b98a011657
font_01_sfnt_off00006355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6355 17856 bytes
SHA-256: 3d09237b64d622911723e49166b0cb8d9eb0a72dc71015b79adc0bc2c1efeaa0

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