Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc438f8b28b88a6…

MALICIOUS

PDF

33.5 KB Created: 2021-06-21 00:39:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5cab3d5f1c31e4a78a6c809725488724 SHA-1: f49b0e6089e7be332a270bfc23bda7a4f859858a SHA-256: ccc438f8b28b88a66154b92e831a3ba819ebed8cdd14526e65c547b32850a390
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized PDFs related to game hacks and cheats. The primary lure appears to be 'Robuxian Free Robux', directing users to a suspicious URL. This behavior is indicative of a link farm designed to distribute malware or lead users to phishing sites. No scripts were extracted, but the PDF structure and embedded links strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/robuxian-free-robux-game-hack PDF link annotation
    • https://sensorcamera-tw.com/upload/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-prison-life-v2-0-cheats_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/vehcle-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/the-final-stand-2-roblox-hack_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/cheat-granny-roblox-2021_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/freepsy-roblox_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/cheat-roblox-theme-park-tycoon_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7E 21468 bytes
SHA-256: 144b077b16a4ecf1cf788e24acf93167396ca41491afe824848e31668e2c8c0f
font_01_sfnt_off00005e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E97 18836 bytes
SHA-256: 0626e8f8fc0cc5e66aa96f3490ae7093072a787a5bcddda5d9204ccd9f7f8dee

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