Malicious PDF — malware analysis report

Static analysis result for SHA-256 6517de7cd753c9f8…

MALICIOUS

PDF

36.1 KB Created: 2021-05-25 08:01:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e896b58e136e98db3d95d8d39e8116b8 SHA-1: 3b6fbdc76b491e327e9318edeb2d4e76848ac83d SHA-256: 6517de7cd753c9f8d0b3b3ac4eb77fbc60a561d0d94f3a166a0db7138871d088
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/431946152/free-robux-codes-2021-game-hack PDF link annotation
    • https://studentcareerinfo.com/images/coin-free-spin_GM406889139.pdfIn PDF document text
    • https://studentcareerinfo.com/images/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • https://studentcareerinfo.com/images/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • https://studentcareerinfo.com/images/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • https://studentcareerinfo.com/images/roblox-no-download-hack_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_off0000320a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x320A 24648 bytes
SHA-256: eca313f60e624466e7a5364ec3fb79c05ffc642ae8dd9f2f14fe5a7f93ce1a79
font_01_sfnt_off00006a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A88 18588 bytes
SHA-256: 0c0011b59677f21f59199ad7d2a82948105ed154610022cedcbab6f052c91d55

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