Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c6c5d25044cbb3…

MALICIOUS

PDF

48.7 KB Created: 2021-05-12 08:31:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c4899732031177d9bd9f1b6e19d752ea SHA-1: 99ebde9cf5ce96e9586829b71085a0c52a30f626 SHA-256: 95c6c5d25044cbb350f8e55c917ba964b64c2867fb59fd4ec5fc2f98428eb72b
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.xyz/app/431946152/free-robux-earn-game-hack PDF link annotation
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/real-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/coin-master-support_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • https://www.hagleygolfclub.co.uk/admin/ckfinder/userfiles/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F74 27996 bytes
SHA-256: 7cb28d413dde78cfdd3ae3da37b55951381467d3d62d504674519616e20cf3fe
font_01_sfnt_off0000907f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x907F 3512 bytes
SHA-256: d2fbe445e4228ea2e3d75d3e8f0f84124f9dd8d3d0cf2c6e4e63bcca92f2519f
font_02_sfnt_off00009c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C12 18244 bytes
SHA-256: b6014a1bf70a80b5b7176295bd11553985cf3fccea183fb301f46a2e8db4226f

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