Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfbcac92711029c9…

MALICIOUS

PDF

35.1 KB Created: 2021-06-19 04:55:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8491238ca5fc61c3246a97bd725c7819 SHA-1: f5dfe4c6091c0894d89ffbca55716d00c701e7c7 SHA-256: cfbcac92711029c9218fd905253c229efdeca0ba1301e75b8a6089b605bcc8db
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or malware downloads. The ML classifier strongly supports the malicious nature of this PDF.

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-23rd-feb-2021-game-hack In PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/gratis-hack-royale-hihg-roblox_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/gamesofficenet-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/app-master_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/how-can-i-earn-robux-for-free_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/how-to-hack-coin-master-with-game-guardian_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/best-sword-in-fight-the-monster-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-free-spins-generator-no-human-verification_GM406889139.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_off00003116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3116 22388 bytes
SHA-256: 82a0d2f24beb6ec4aa0673355af499c9261ac5f7ab4d2e91dda5510030fbcbe7
font_01_sfnt_off000062f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F1 19464 bytes
SHA-256: 6219d3f0ae5951b40bd3f666e1e492e8fd42c070f3cf18a7afc94064b26f420f

Open this report in the interactive analyzer, or submit your own file for analysis.