Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc240d2745f8f4a0…

MALICIOUS

PDF

43.5 KB Created: 2021-05-15 01:40:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 91f6a26cc5080e798521776fea293f9d SHA-1: e20b61783a5d3162e28556cd2299b4e652f54c06 SHA-256: bc240d2745f8f4a04c50f8690cbd7cd30bedf1cfde119117eb013083a13fdbf4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting "free generators" and "game hacks" for popular games. The primary link identified, https://netcdn.xyz/app/431946152/best-free-roblox-executor-game-hack, is flagged as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick users into visiting malicious sites, likely as part of a phishing or scam campaign.

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/best-free-roblox-executor-game-hack In PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/roblox-assassin_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/give-me-robux-now_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://zephyrtoys.com/assets/ckfinder/userfiles/files/minecraft-education-edition-free-download_GM479516143.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_off00004d15.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D15 25336 bytes
SHA-256: f6b0d2e984832f484eae5b682535436a0d89e582e689b91fbedbcb817981dd5a
font_01_sfnt_off0000882a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x882A 18192 bytes
SHA-256: 733e9a0a0591b99c013d9411b1913d02d457623b74e1d64140f900850ee20a3c

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