Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca220008b31c27c…

MALICIOUS

PDF

43.4 KB Created: 2021-05-15 14:35:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f739ddd3a3f15786436ca98e0928fb83 SHA-1: 66ebe54d5a25641b4bc8de8c8d8e129ce0fb0a71 SHA-256: 0ca220008b31c27c22950eb76576e0da59580723a6c8598bc96f5f487b5457bc
142 Risk Score

Malware Insights

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

The PDF document contains numerous links disguised as game hacks and free rewards, a common lure for phishing or malware distribution. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of many external links indicate a link farm designed to redirect users to potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/roblox-rewards-game-hack PDF link annotation
    • https://www.kambati.co.za/images/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • https://www.kambati.co.za/images/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/coin-master-hacks-2021_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/free-minecraft-client_GM479516143.pdfIn PDF document text
    • https://www.kambati.co.za/images/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://www.kambati.co.za/images/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • https://www.kambati.co.za/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.kambati.co.za/images/free-minecraft-website_GM479516143.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_off00004a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A13 26232 bytes
SHA-256: a02da70378d3aac7a906f11598c6312241c8cdb6d21b3a28cf21496aaa3b3622
font_01_sfnt_off00008706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8706 18348 bytes
SHA-256: e746527f818eeec2fed82505c45458a072d0ef9a1f0f70f4e50d0d9e13a60d55

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