Malicious PDF — malware analysis report

Static analysis result for SHA-256 86691ac36e5582a5…

MALICIOUS

PDF

35.4 KB Created: 2021-07-09 01:17:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 47c014661005dc4fd5368e70785a05ba SHA-1: 458ce4ff4f5b9bd491d421b1ac8f92f256f54e6e SHA-256: 86691ac36e5582a5f7ed243a67a2562c1ae7c79f614a3b2c6e5ec6daf0512993
102 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 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/431946152/rewards-robux-game-hack PDF link annotation
    • http://110.232.83.89/slimsppks/repository/roblox-reddit-hacks_GM431946152.pdfPDF link annotation
    • http://110.232.83.89/slimsppks/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/hack-troll-roblox_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-1-000-000_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-robux-card-codes-2021-august_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/minecraft-xbox-360-free-download-code_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/roblox-free-items_GM431946152.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/minecraft-handbook_GM479516143.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://110.232.83.89/slimsppks/repository/minecraft-java-free-download_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
font_00_sfnt_off000031e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E0 22920 bytes
SHA-256: c930184800365c10a655f85298898a924558830671e41ba649e9780ef536eeb8
font_01_sfnt_off00006597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6597 18888 bytes
SHA-256: 13d7bc9f49b8b591f3713cbd9cb1632c430be663ac63cdfbfdb50d830d5ed704

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