Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfc6e1ad18656efb…

MALICIOUS

PDF

43.1 KB Created: 2021-05-16 22:38:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c6a6305f78b78a1e81b710b0f7672e4a SHA-1: ab670342a983c71b069b0ad99288a2b2a46a5829 SHA-256: cfc6e1ad18656efb8e2296d079d8995dc29ff3e26895acb4cbef4fd822d460ae
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a 'game hack' redirect lure, pointing to a URL that likely hosts malicious content or scams. The presence of a fake CAPTCHA heuristic further supports the intent to trick users into interacting with malicious links. The document body and embedded artifacts do not contain executable scripts, but the primary attack vector is the embedded malicious link designed to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/robux-hack-game-hack PDF link annotation
    • https://www.jjpremiers.com/files/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • http://jjpremiers.com/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • http://jjpremiers.com/files/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-minecraft-com_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/get-free-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/get-free-robux-no-verification_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
stream_003_off0000491e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x491E 26248 bytes
SHA-256: 28c1d06091fa224dac86ad4f3221458e43107d74d753a50b551cc853e87105f4
font_01_sfnt_off00008659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8659 18248 bytes
SHA-256: dc70545b78036d2d989a53e60713ee6b6ba72604799932bb5b2fc13357d7a02a

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