Malicious PDF — malware analysis report

Static analysis result for SHA-256 c751d47e53d62ec8…

MALICIOUS

PDF

34.8 KB Created: 2021-07-01 06:24:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f33f296546bda8507b8c6d8c5707f7f8 SHA-1: c706e17ff587a6a020ff84b9954682fb9c79ed85 SHA-256: c751d47e53d62ec839cf113fecaf7eac2b2794de914d0debd396165fb5878637
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/free-robux-generator-com-hack-game-hack. This URL is presented as a 'free generator / game hack', indicating a social engineering lure to trick users into clicking. The presence of embedded URLs and the ML classifier's high confidence score suggest this document is designed to lead users to malicious content or 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.co/app/431946152/free-robux-generator-com-hack-game-hack In PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-roblox-in-game-hacks-download_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-rs-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/roblox-hacking-system-download_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/epic-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-do-i-hack-roblox-game_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-join-roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/rocashcom-earn-free-robux-by-watching-videos-and-completing-sur_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/how-to-get-robux-free-quik_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/hack-para-roblox-reign-teleports-666-y-mas-tutorial_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-codes-2021-online_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/segunda-guerra-mundial-roblox-mapa-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://digilibfisip.unla.ac.id/repository/get-free-robux-on-roblox-2021_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_off00003075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3075 22428 bytes
SHA-256: 27e0914188baed18ef1b3e3da0f5e67e468b6a12e8f9f7fbb6a48508e12b524f
font_01_sfnt_off0000625c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625C 19248 bytes
SHA-256: 4c483736fefba98546380782cb531c70bafcec15fb45349fd3dfbf9b7877a7b2

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