Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c02c1282b6d0af2…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 23:57:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c3e387e5366f0d56d9a5f16e34838ea7 SHA-1: a97690e73de5d49ba5afe2330df71912801dcd21 SHA-256: 4c02c1282b6d0af24e2fa1498a27a07bf455f9bede8b201028bcc6af38d85b56
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/free-spin-link-of-coin-master-game-hack PDF link annotation
    • http://e-library.dharmawangsa.ac.id/repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-no-downloads-2021-real_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/pokemon-go-free-walk-ios_GM1094591345.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/mad-city-cheat-codes-season-2-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/wie-kann-man-roblox-hacken_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-grand-blox-auto-money-cheat_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-cheat-tool-download-2021_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/cch-ly-robux-free-ko-hack_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-34-4-hack-download_GM406889139.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_off00002fac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FAC 22380 bytes
SHA-256: dfc4288af4b712eec27dfe8d1c17c157bb58b0e1a8324cabdee1c2747afcc589
font_01_sfnt_off0000616c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616C 18344 bytes
SHA-256: 0f2d33dda11e71189f765515efb7c5f5639061ef869ee1e05892dc19524cfbd0

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