Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a13cdf5cda8389…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 15:33:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 70ef1048ee676a09ceece08dc63fe568 SHA-1: d8e2aa78e4f5c2e0bc85eaf7c62950d7a0f53473 SHA-256: e5a13cdf5cda8389a6a039d7fd3c8dbea3bfbfbba5ea4ce742e0f2c9c0ab5d62
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links that redirect to websites offering game hacks and generators, a common lure for malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of these links indicates an attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the document's structure and embedded URLs suggest it is designed to lead users to a second-stage download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • 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.
  • 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.online/app/406889139/rare-free-links-to-coin-master-game-hack PDF link annotation
    • https://www.jcn.co.uk/uploads/files/files/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-generator_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-hack-tips_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/pubg-uc-olx_GM1330123889.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-earn_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-jailbreak-hack_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_004_off00005423.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5423 26148 bytes
SHA-256: c7ee8652975207001d15435f208181dccddf10bb128934a6d5afa202de4c5ed5
font_01_sfnt_off00008fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FCC 17880 bytes
SHA-256: 52bfad4f4c19f81cbdb35045d00ab5f214a6d1a7ce3c9e0998cef8a9f07687f9

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