Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b428bd495f45e3…

MALICIOUS

PDF

44.9 KB Created: 2021-06-09 12:17:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3312fad5c9f0e028018cf23bf730469d SHA-1: 55ef53f7df79cbaca786f2d7bef06582d0e63358 SHA-256: 47b428bd495f45e3cd6b1828ac3856159a6debbcd08b0cae08d88ab0e287ffaa
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links and a document body that attempts to lure users with promises of free game currency and hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or redirection scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classification strongly suggest malicious intent, likely to redirect users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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.
  • 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.tw/app/431946152/roblox-play-free-online-now-game-hack
    • http://elib.acls-indonesia.com/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • http://elib.acls-indonesia.com/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://elib.acls-indonesia.com/repository/minecraft-pe-apk-free-download_GM479516143.pdf
    • http://elib.acls-indonesia.com/repository/how-to-make-robux-on-roblox_GM431946152.pdf
    • http://elib.acls-indonesia.com/repository/coin-master-free-spin-reward-links_GM406889139.pdf
    • http://elib.acls-indonesia.com/repository/do-coin-master-hacks-work_GM406889139.pdf
    • http://elib.acls-indonesia.com/repository/freespinandcoin-blogspot-coin-master_GM406889139.pdf
    • http://elib.acls-indonesia.com/repository/coin-master-free-spins-iphone_GM406889139.pdf
    • http://elib.acls-indonesia.com/repository/coin-master-free-spins-no-verification_GM406889139.pdf
    • http://elib.acls-indonesia.com/repository/roblox-generator-no-verification_GM431946152.pdf
    • http://elib.acls-indonesia.com/repository/coin-master-hack-app-ios-download_GM406889139.pdf
    • http://elib.acls-indonesia.com/repository/master-coin-free-spin-daily_GM406889139.pdf
    • http://elib.acls-indonesia.com/repository/how-to-get-free-robux-website_GM431946152.pdf
    • http://elib.acls-indonesia.com/repository/free-coin-master-s_GM406889139.pdf
    • http://elib.acls-indonesia.com/repository/spin-coin-master-free_GM406889139.pdf
    • http://elib.acls-indonesia.com/repository/can-you-give-me-robux_GM431946152.pdf
    • http://elib.acls-indonesia.com/repository/coin-master-fan-page-free-spins_GM406889139.pdf
    • http://elib.acls-indonesia.com/repository/coin-master-spins-hack-2021_GM406889139.pdf
    • http://elib.acls-indonesia.com/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdf
    • http://elib.acls-indonesia.com/repository/coin-master-tricks-and-hacks_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051a5.bin
398377eabbffd53a010668cb315ffa48575860ae8a3b2d1b31d8b4bb9b06bda8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51A5 25012 bytes
font_01_sfnt_off00008b7c.bin
ad814b96eaf7cacc6d31553e7521d56356b80e3cd6d4ee603a12c7dfadb0c79f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7C 18796 bytes

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