Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bdc636e08b4056b…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 21:54:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4dd9effc92706003124ac25bb4087f75 SHA-1: 159d1eeb5aa656b2c3e5645923652a8fee8a5a95 SHA-256: 8bdc636e08b4056b98298c0687ede3cf7f4c29c6c1ec55488073244f64544187
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 0.9865

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.online/app/406889139/free-coin-master-spins-without-human-verification-game-hack PDF link annotation
    • http://opac.stieimalang.ac.id/repository/robux-xyz_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/www-robux-com_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005209.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5209 24760 bytes
SHA-256: da950eab826679022feac74dd66b1a703e63f4a0381727943a2064afce3ce317
font_01_sfnt_off00008b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B32 18784 bytes
SHA-256: 2ea73084728f1b585ff149514882d7306693ae2bd3bbffba62615d44dd485d67

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