Malicious PDF — malware analysis report

Static analysis result for SHA-256 26eaf1de9112e323…

MALICIOUS

PDF

45.9 KB Created: 2021-05-16 02:04:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2ca315e269249fabd8ae38f789691b87 SHA-1: d8d8dd10150c90783a97dc7c5f0039402faee0c3 SHA-256: 26eaf1de9112e32306ed50536723d092c6db22711dbb2bd914f7cc38a3544690
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites offering game hacks and free virtual currency, a common lure for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract traffic. The presence of a 'download button' lure further supports the malicious intent of directing 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 https://netcdn.xyz/app/431946152/free-robux-instantly-game-hack PDF link annotation
    • http://gavertrimmers.be/images/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://gavertrimmers.be/images/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://gavertrimmers.be/images/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • http://gavertrimmers.be/images/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • http://gavertrimmers.be/images/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://gavertrimmers.be/images/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://gavertrimmers.be/images/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://gavertrimmers.be/images/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://gavertrimmers.be/images/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://gavertrimmers.be/images/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://gavertrimmers.be/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://gavertrimmers.be/images/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://gavertrimmers.be/images/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://gavertrimmers.be/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://gavertrimmers.be/images/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://gavertrimmers.be/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://gavertrimmers.be/images/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gavertrimmers.be/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://gavertrimmers.be/images/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://gavertrimmers.be/images/free-robux-no-verification-needed_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_off00004b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B7E 29968 bytes
SHA-256: 405b2fb0b9f5e4f1a9a2d4ee0d66addd86acd2e2255201d91dfeff64aef33f9b
font_01_sfnt_off00009033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9033 18600 bytes
SHA-256: eeb00711cf2e5591db958639ea5d908a8ba1b5c4404aa75c69e8a5349c023cb9

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