Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a7eea17146be8ee…

MALICIOUS

PDF

42.5 KB Created: 2021-05-14 16:04:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8301cef0eaae0b536372d6b75a70efac SHA-1: bd5fb9b0e2ccfd0c21dddbb0741f29728cdeddae SHA-256: 8a7eea17146be8eede82ca9cd3e3623110aae9a3f9d481f842830604c5fdff74
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which are structured as SEO-optimized slugs pointing to game-related download lures. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malware or lead users to phishing sites. The document body, though partially garbled, contains a URL that aligns with the observed link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/479516143/how-can-i-play-minecraft-for-free-game-hack
    • http://jdlwealth.com/images/free-downloads-for-coin-master-daily-rewards_GM406889139.pdf
    • http://jdlwealth.com/images/roblox-free-play-no-download_GM431946152.pdf
    • http://jdlwealth.com/images/free-cracked-minecraft-server-hosting_GM479516143.pdf
    • http://jdlwealth.com/images/free-robux-videos_GM431946152.pdf
    • http://jdlwealth.com/images/coin-master-free-spins-hacktman_GM406889139.pdf
    • http://jdlwealth.com/images/how-do-you-get-roblox-for-free_GM431946152.pdf
    • http://jdlwealth.com/images/free-spin-online-tool-coin-master_GM406889139.pdf
    • http://jdlwealth.com/images/wwwcoin-master-hack-game-download_GM406889139.pdf
    • http://jdlwealth.com/images/robux-free-co_GM431946152.pdf
    • http://jdlwealth.com/images/does-roblox-premium-expire_GM431946152.pdf
    • http://jdlwealth.com/images/coin-master-ios-gods-hack_GM406889139.pdf
    • http://jdlwealth.com/images/minecraft-pe-free-ios_GM479516143.pdf
    • http://jdlwealth.com/images/how-do-i-get-free-coins-in-coin-master_GM406889139.pdf
    • http://jdlwealth.com/images/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • http://jdlwealth.com/images/coin-master-free_GM406889139.pdf
    • http://jdlwealth.com/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://jdlwealth.com/images/hackear-coin-master-espaol_GM406889139.pdf
    • http://jdlwealth.com/images/aimbot-exe-roblox_GM431946152.pdf
    • http://jdlwealth.com/images/robux-free-online_GM431946152.pdf
    • http://jdlwealth.com/images/free-robux-on-iphone_GM431946152.pdf
    • https://code.giftcards.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004978.bin
80e3f147bb9a5b32f5859e41192ea3b7e27ce29dd1bd2bc0bb0646d820ae28c6
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4978 25664 bytes
font_01_sfnt_off00008419.bin
cc9f65e76ff55973cb5eb44e8d52a3d8c8dc11961be9de6072311badebd77d80
pdf-font-stream PDF embedded font (sfnt) at offset 0x8419 18284 bytes