Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dd9610f9b38cdef…

MALICIOUS

PDF

41.1 KB Created: 2021-05-19 20:01:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 335afcf44235608c21c65df140de17bf SHA-1: 986e6cd4c29e8def810043648b856b7554c6410a SHA-256: 4dd9610f9b38cdefbfb3dcb7d0fa2fd012cec5daef55f4e146b39667c61afef7
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/hack-coin-master-game-apk-game-hack PDF link annotation
    • http://quatangthienthan.com/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • http://quatangthienthan.com/images/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://quatangthienthan.com/images/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://quatangthienthan.com/images/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-spin_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://quatangthienthan.com/images/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • http://quatangthienthan.com/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/coin-master-free-pet-snacks_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • http://quatangthienthan.com/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://quatangthienthan.com/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://quatangthienthan.com/images/free-spins-from-coin-master_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_003_off000047e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47E3 23984 bytes
SHA-256: 30f4bfa0067ce2a997a85059752fb883fb22d68267285f9c5d176fea149d1f93
font_01_sfnt_off00007e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E89 18152 bytes
SHA-256: 31b27374ffcb065f7237e3afe8d60b30aadfbb844f2d6e99af30877ce40d7303

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