Malicious PDF — malware analysis report

Static analysis result for SHA-256 e57d1483b392016a…

MALICIOUS

PDF

34.6 KB Created: 2021-06-21 07:34:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2a5faf84bbbfe3ab4f19c1869ddb5aba SHA-1: 4cae302d3684c790403aa6cf8a905ec79e3a2746 SHA-256: e57d1483b392016aca6d836480a3bd71db103e7fc83f832a10c010815d31961f
82 Risk Score

Malware Insights

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

This PDF file contains multiple embedded URLs that redirect to sites offering 'free Robux' or game hacks, acting as a lure. The primary URL, http://netcdn.co/app/431946152/800-free-robux-ad-game-hack, is directly linked to a heuristic firing for a game hack redirect. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent. The document's purpose appears to be to trick users into visiting these sites, likely leading to further malware downloads or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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/431946152/800-free-robux-ad-game-hack PDF link annotation
    • http://aeridefense.com/image/data/files/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/update-boku-no-roblox-remastered-hack_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/do-you-earn-robux-for-taking-free-items_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-get-skeleton-package-free-roblox_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/roblox-airport-free-game_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/pastebin-robux-2021-hack_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/roblox-skins-boy-free_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_off0000300e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300E 22228 bytes
SHA-256: 46f3f7b36d1b8fb109e2fa74bb66e2fafb7b7532c8d346be505e0544b024f5cd
font_01_sfnt_off00006136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6136 19272 bytes
SHA-256: 57a139b6bd59820da935014fdeae757a3edc3969c92a2c923c0b67498e00115f

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