Malicious PDF — malware analysis report

Static analysis result for SHA-256 940c1e791c472157…

MALICIOUS

PDF

40.3 KB Created: 2021-04-28 12:07:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ede520459441199cf6bb575652ba3344 SHA-1: 7551e563baf51201a048a71f79a60445dadda9c1 SHA-256: 940c1e791c472157e12dc6159e1fa92b32023638b6d06ef84942ab398d183f2d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks. The primary link, https://netcdn.xyz/app/431946152/roblox-buy-robux-button-inspect-hack-game-hack, is identified as a malicious redirector. The document body and embedded links suggest a lure for users seeking game cheats or currency, leading them to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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-buy-robux-button-inspect-hack-game-hack In PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-python-code-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/robux-redeem-free.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/ultimate-driving-roblox-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-bubble-gum-simulator-hack-download.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/salvage-roblox-invincibility-hack-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-free-pin-generattor-no-survey.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-models-hack-your-game-in-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-anime-roblox-clothes.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/games-you-can-hack-on-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-buy-robux-for-free.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_off000040a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x40A6 25524 bytes
SHA-256: 779cef6f3ddb5973444d5dd5a34f1335e3a2d3ce25aeef435ae8d8e30209b71e
font_01_sfnt_off00007a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A22 18784 bytes
SHA-256: c051e2082dd39e25be4cc5736611457a07dcef41d16880205ad67ef9191f0fa3

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