Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb00176b688c30f2…

MALICIOUS

PDF

39.8 KB Created: 2021-05-10 15:11:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 38205d839e10daee58471dcd46b8271e SHA-1: 531b69b59c3c0bbb523c6425f5792cfc6ae8b448 SHA-256: cb00176b688c30f29175ea1f8ffb3c18d96d739f45b06702537f2f9307f98e4b
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 0.9945

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/coin-master-unlimited-spin-apk-free-download-game-hack PDF link annotation
    • http://learningarabic.co.uk/images/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-hack-apk-april-12-2021_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_off00003f2f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F2F 24548 bytes
SHA-256: a019d33960af0238aae08df576e2bae8aa2803213cb00d3966d942271e5453d9
font_01_sfnt_off000077a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A2 19084 bytes
SHA-256: c2d82cd4a12004e31f0bd3c8b1caf06db58ba118ed59957898480102bbe81bed

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