Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5e28649696a1c8d…

MALICIOUS

PDF

35.3 KB Created: 2021-07-02 03:50:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e3a618353f593851db3061dded1a747b SHA-1: ec55b2fe83bea1f7d13ba9092ef5052bc7f5dcfe SHA-256: a5e28649696a1c8dcdb50d90a06820c3852906b498d109b51f568ec4e5caa98b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes free spins and coins, indicative of a scam or lure. The presence of a PDF_URI heuristic firing and the ML_NYX_PDF_MALICIOUS flag strongly suggest malicious intent. The document likely serves as a lure to direct users to external sites, potentially for malware download or further phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/406889139/free-spins-and-coins-com-game-hack
    • https://elearning.man2semarang.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-daily_GM406889139.pdf
    • https://elearning.man2semarang.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin_GM406889139.pdf
    • https://elearning.man2semarang.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-ios_GM406889139.pdf
    • https://elearning.man2semarang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdf
    • https://elearning.man2semarang.sch.id/__statics/gudangsoal/files/coin-master-for-pc-free-download_GM406889139.pdf
    • https://elearning.man2semarang.sch.id/__statics/gudangsoal/files/best-free-coin-master-spins_GM406889139.pdf
    • https://elearning.man2semarang.sch.id/__statics/gudangsoal/files/coin-master-link-app_GM406889139.pdf
    • https://elearning.man2semarang.sch.id/__statics/gudangsoal/files/free-robux-giveaway_GM431946152.pdf
    • https://elearning.man2semarang.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • https://elearning.man2semarang.sch.id/__statics/gudangsoal/files/free-spins-coins-coin-master_GM406889139.pdf
    • https://elearning.man2semarang.sch.id/__statics/gudangsoal/files/where-to-get-free-robux_GM431946152.pdf
    • https://elearning.man2semarang.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-ios_GM406889139.pdf
    • https://elearning.man2semarang.sch.id/__statics/gudangsoal/files/minecraft-coins-free_GM479516143.pdf
    • https://elearning.man2semarang.sch.id/__statics/gudangsoal/files/coin-master-cheats-for-free-spins_GM406889139.pdf
    • https://elearning.man2semarang.sch.id/__statics/gudangsoal/files/minecraft-online-free-download_GM479516143.pdf
    • https://elearning.man2semarang.sch.id/__statics/gudangsoal/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdf
    • https://elearning.man2semarang.sch.id/__statics/gudangsoal/files/free-minecraft-premium-account_GM479516143.pdf
    • https://elearning.man2semarang.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
    • https://elearning.man2semarang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • https://elearning.man2semarang.sch.id/__statics/gudangsoal/files/www-roblox-com-robux-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003387.bin
4fa8f2a980b74f45a539b5dfea2ad731676fbc22c4fd57abb247744778fb1ff2		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3387 23152 bytes
font_01_sfnt_off000066ef.bin
1fd8ebdda92b297a515e174869cd147c0798f4867b2b88ca6af1ff2f07f5dfbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66EF 18504 bytes

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