Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ed735e76b9fb03…

MALICIOUS

PDF

42.9 KB Created: 2021-05-13 10:14:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 758db9a3c0c220776c77aec2ac9eb247 SHA-1: eac7ad770973f7dd5261f31116f0ef2fbdad6774 SHA-256: d6ed735e76b9fb039f97e457c408e55f69f1c123ae8be35cc613f46f2d103e4d
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links to external websites, many of which are SEO-optimized PDFs related to game hacks and free spins. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and 'PDF_SEO_LINK_FARM' indicate a strong attempt to redirect users to potentially malicious content. The ML classifier also flagged this PDF with high confidence, suggesting malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • 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/todays-free-spin-and-coin-links-game-hack PDF link annotation
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/spin-coin-master_GM406889139.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • https://pelatihsenamjogja.com/ckfinder/userfiles/files/free-robux-games-on-roblox_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_003_off000048ee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48EE 26212 bytes
SHA-256: 003245fa0776d8c468dc02a9b815f147e6aa759781b8ba665024a1760a3f25ea
font_01_sfnt_off0000853c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x853C 18304 bytes
SHA-256: fe41b9c6f73a07cbbf88dd054bef46cc881cfc19b14a93a0ff48235cedd50557

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