Malicious PDF — malware analysis report

Static analysis result for SHA-256 808a758e11a359fa…

MALICIOUS

PDF

41.1 KB Created: 2021-05-19 20:54:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c0c9fbc9123bec36be6f73ad1dd41503 SHA-1: bb5b6d79826a484583951ee1078891812e7ec255 SHA-256: 808a758e11a359face60350c6a130eec9f9323ac897d675f71c71d4637f8a493
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 0.9971

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-premium-roblox-game-hack PDF link annotation
    • http://autoskola-scp.com/files/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-hack-apk-download-latest-version_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/tiktok-free-without-downloading_GM835599320.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/google-moon-active_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/get-free-robux-no-human-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
font_00_sfnt_off00004544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4544 24336 bytes
SHA-256: 10641ab2b08e00b0ec42ee210b3d7f274343e2a91059879c9ee7a4edbb607486
font_01_sfnt_off00007d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D61 18620 bytes
SHA-256: db698e20de7c3d454232d28484b91ac7eeacd2d96f4c59a267e05c3027dbd208

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