Malicious PDF — malware analysis report

Static analysis result for SHA-256 54310b9abd6ec2fd…

MALICIOUS

PDF

48.8 KB Created: 2021-05-12 01:10:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e08005e3dc368edd620707452f0b66b5 SHA-1: 5548fabd75e37fc85aa3b2efdd27c8ab9b0c4d3f SHA-256: 54310b9abd6ec2fd2ddbf11c282982c92c6d5cfff47f08fab8171adf5c29eddb
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 0.8642

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/406889139/free-coins-for-coin-master-blogger-game-hack PDF link annotation
    • http://pustaka-smpn3tpi.com/repository/fbchampion_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/hack-coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aaf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AAF 24352 bytes
SHA-256: a76a4d30a40a131aeeffadce87f1e23665c3f0df39ad394161eefb75c4b319ef
font_01_sfnt_off00008220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8220 4628 bytes
SHA-256: ff166169fb7bd32bb9528c165b261050626edd26fdc76337d5cc54b5e60d7b15
font_02_sfnt_off0000920d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x920D 2788 bytes
SHA-256: 6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530
font_03_sfnt_off00009bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BFC 18288 bytes
SHA-256: 525699ae71861fffeab431a07c950b4914d38a871fb98becad0e0bea9ac3f1df

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