Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf1b3e4632ec15f1…

MALICIOUS

PDF

35.6 KB Created: 2021-06-19 13:37:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 6361b1f43f41e3d65504a973df3ff8d9 SHA-1: b3d2fa1e38aad4cbe998b3b4bf375a39ea07cbd7 SHA-256: cf1b3e4632ec15f1c39949452d2ef988f2d3e4a9a66fd33a308c969a4ec046e6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a game hack generator, which is a common lure for phishing or malware distribution. The link redirects to known malicious infrastructure, indicating a high likelihood of a malicious workflow. Although no scripts were extracted, the PDF's structure and embedded URLs strongly suggest it's designed to trick users into downloading potentially unwanted or malicious software.

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/synapse-roblox-free-download-game-hack In PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-2021-no-hacks_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/roblox-c9m_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/xbox-one-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/funny-free-roblox-shirts_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/roblox-free-pets_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/trigon-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • https://www.pertonacademy.co.uk/admin/ckfinder/userfiles/files/roblox-hack-app_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_off0000326b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x326B 22504 bytes
SHA-256: 873df85864e1863361c809db7a74350c8a79d3341c02ccd6bd350dd3d04c1a7b
font_01_sfnt_off0000649b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649B 19512 bytes
SHA-256: 7da73edf140496b7de741247622447fc01b10910c59fc7d44162edb3e0c91153

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