Malicious PDF — malware analysis report

Static analysis result for SHA-256 6859f90f5f23bf43…

MALICIOUS

PDF

32.9 KB Created: 2021-07-04 20:23:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 85ccdc4d0c897881ee07ee0ef7987a40 SHA-1: 5c62ee9cd20c9484da65d0cf21bdb50fb8a1efdb SHA-256: 6859f90f5f23bf433dabd19b4cdafddbfa0d198478a4362b2aad4d3c0df945b9
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 http://netcdn.tw/app/406889139/links-to-get-free-spins-on-coin-master-game-hack PDF link annotation
    • http://library.umuslim.ac.id/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-ack_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/dragon-ball-z-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/generator-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robuxs-app_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/cross-site-scripting-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/pubg-10-000-uc-free_GM1330123889.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-adopt-me-hack-tool_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-robux-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_002_off00002c05.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C05 22200 bytes
SHA-256: 5b8c9597ad379c85634588df0b45bdd76d12c0d740904903d9aa6ffb447b1a69
font_01_sfnt_off00005d7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7C 18344 bytes
SHA-256: 1dde3a634a35d4e9c8cc8702715575f7350bc413b734fd9f7bac35511dc11ac3

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