Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb0c6466e20cf8e7…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 16:31:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8c44c889f196231acc60feafc12c5fa4 SHA-1: 45ff1b9e1fdb191850a5ee4b5ba54014b2e7e5eb SHA-256: cb0c6466e20cf8e7654e800c1b0d248a9d371259fc0b866422e9cc259b275de0
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/406889139/free-spins-and-coins-coin-master-2021-link-game-hack PDF link annotation
    • http://118.98.227.172/opac/repository/coin-master-free-gift-links-2021_GM406889139.pdfPDF link annotation
    • http://118.98.227.172/opac/repository/wizard-life-roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-printable-roblox-miniature-chocolate_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-get-free-roebucks-without-verification_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-hack-roblox-super-power-training-simulator_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/dimonds-hack-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/i-got-999999999-robux-for-free-real_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/youtube-how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-find-free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-roblox-stolen-places-download_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-how-to-hack-filtering-enabled-games_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/robuxian-hack-roblox-animations_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_002_off00003206.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3206 22376 bytes
SHA-256: 36374ecb890840e30040baddfa48acf98a9754736019823b27e854dcc72e5386
font_01_sfnt_off000063df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DF 18920 bytes
SHA-256: 5da8567ac5cad1a9e8b19f4308895a295b9244689bea2bda45786747592bc9c5

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