Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae1035ae33ff2d7…

MALICIOUS

PDF

37.1 KB Created: 2021-05-20 22:33:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d2a808ae92a0e362255c7aad5a05e686 SHA-1: 2715c8337a63354117198e222cff01b6e9ca9502 SHA-256: cae1035ae33ff2d796842852b5ba772268ba4b1e620d284f401ca4f882bcf177
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 0.9447

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/431946152/free-robux-without-downloading-anything-game-hack PDF link annotation
    • https://deutsch-study.com/image/data/files/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/coin-master-hack-pro_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_002_off00003229.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3229 25464 bytes
SHA-256: 45c26fdc0adc488d96fc5515a29606799b5114061531b444186394cdd6dcdfc8
font_01_sfnt_off00006ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC4 19880 bytes
SHA-256: 6bc5cab104a17e5be196146aaeb40b5940258b3e295a46c016ac1ce7c3ec9493

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