Malicious PDF — malware analysis report

Static analysis result for SHA-256 830b585c4f8443aa…

MALICIOUS

PDF

47.9 KB Created: 2021-05-16 23:10:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f0ac80970ae720728b7166b9bb8dd3da SHA-1: abf3156287a25cee8abc44360409fc063159f5a2 SHA-256: 830b585c4f8443aae1fa4dcc99fe26a250333eb8391933471f5237965667efd4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free generators' for popular games. The primary malicious URL identified is https://netcdn.xyz/app/431946152/roblox-18-game-hack, which is likely used to distribute further malware or phishing content. The document body, though heavily obfuscated, contains references to game-related lures and embedded URLs, reinforcing the phishing and redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/roblox-18-game-hack In PDF document text
    • https://www.zagi.hr/files/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://zagi.hr/files/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • https://www.zagi.hr/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/roblox-executor-free_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/bux-free-robux_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://www.zagi.hr/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/rewardrobux-com_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/give-free-robux_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cc2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CC2 27656 bytes
SHA-256: 08e3fa50f515c30fb1b6a0950aec7057b6a9b33ea23882205b6fd88f814b1f01
font_01_sfnt_off00008c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9D 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9944 18100 bytes
SHA-256: b4983712f09b148f8a8b45296f8ff968c6e941a598ef477ab36d5db1dcb352e3

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