Malicious PDF — malware analysis report

Static analysis result for SHA-256 99312e0fd2e23b5d…

MALICIOUS

PDF

35.9 KB Created: 2021-05-21 15:05:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 809f09f3ba76acabe23fbaa5c5e5fe7a SHA-1: 4031fcee8b609d30088908215e80af1fef073637 SHA-256: 99312e0fd2e23b5d55f6168a82a18e7d60eb85741e9abbc2c90110adc37067b4
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 0.9492

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/835599320/free-likes-on-tiktok-game-hack PDF link annotation
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://www.itmnc.com.au/uploaded_files/userfiles/files/free-coins-and-spins-for-coin-master_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_off00003236.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3236 25812 bytes
SHA-256: 4aa4450385ad731c86f512d9c00e4572e0722b9683368f9efc978c5c7f21ebe3
font_01_sfnt_off00006d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D75 17456 bytes
SHA-256: 68a974c9aa3c870eecc965d525ccb957938ff5f02ba9183d05fa54c35671def6

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