Malicious PDF — malware analysis report

Static analysis result for SHA-256 75b8f842526074f8…

MALICIOUS

PDF

42.0 KB Created: 2021-05-11 01:35:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ae15f69d37175d24f28983a87fa04e21 SHA-1: 21e68a86f7cafaee47925b127ccf289252fc2190 SHA-256: 75b8f842526074f8b8be60c3d6f3d5283cc6bdacfd4156987901706a74906f93
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 0.9971

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/coinmasterdailyfreespins-com-game-hack PDF link annotation
    • http://www.myresidence.lu/userfiles/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/i-robux_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/minecraft-free-school_GM479516143.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/minecraft-java-server-hosting-free_GM479516143.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_off0000493f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x493F 24568 bytes
SHA-256: 4109326c72ea9299ac3655b46adf268d31ad49700861410f9199c8c3a5fa1f6e
font_01_sfnt_off00008183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8183 18412 bytes
SHA-256: e2599cc8a892eefc31c10bac6f2183dab570b4c76225f1f1bdeb83a3d04eb4f4