Malicious PDF — malware analysis report

Static analysis result for SHA-256 97dd3bb7479b0f26…

MALICIOUS

PDF

44.5 KB Created: 2021-05-10 23:39:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1c0e04724dc656d6fc65faa86edbc8b8 SHA-1: 26e3bb4a5bb747695695770e3017756e8c70a92b SHA-256: 97dd3bb7479b0f2675b7715a1741506280ceac04babd44b052dc2f42c3a40403
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 0.9980

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 https://netcdn.xyz/app/431946152/sites-to-get-free-robux-game-hack PDF link annotation
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/free-robux-net_GM431946152.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/coin-master-download_GM406889139.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/robux-generator_GM431946152.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://nextindiatimes.com/assets/ckfinder/core/connector/php/uploads/files/free-robux-generator-for-roblox-2021_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
stream_003_off00004e6a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E6A 26244 bytes
SHA-256: c969703b0ecbb230e34357a328c62cc7e87f2f261c29cf2044588e8aa80df318
font_01_sfnt_off00008bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF5 18236 bytes
SHA-256: b3c6e6b81f0aade665b3e9e34fb665158f9d1803db8458128eb468a961d6d74b

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