Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dfbce3af50b68cb…

MALICIOUS

PDF

38.9 KB Created: 2021-05-20 18:41:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1dd384f21439c4e45ecbf98a75c223a8 SHA-1: f50eef9698294bc3604d83a88626a6572b097c64 SHA-256: 8dfbce3af50b68cb4403a1519d591e59dcf72095dab8a8fba3f6bc8e36c8b3f8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains lures for 'Free Robux Hacks' and a call-to-action to download a file, strongly suggesting a phishing or social engineering attack. The embedded URLs point to suspicious domains, likely hosting malware or further phishing content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9377

Heuristics 4

  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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-hacks-no-verification-game-hack PDF link annotation
    • https://www.ayampotongsyariah.com/ckfinder/userfiles/files/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • https://www.ayampotongsyariah.com/ckfinder/userfiles/files/roblox-hax_GM431946152.pdfIn PDF document text
    • https://www.ayampotongsyariah.com/ckfinder/userfiles/files/how-to-use-wurst_GM479516143.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_off00003146.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3146 30512 bytes
SHA-256: 3dae72321561c55978abb5ba236223c8bfb8ca69c52a8fcf9650d82b79df2efe
font_01_sfnt_off00007457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7457 19132 bytes
SHA-256: 08626ff16c886d868348795789c1e58a80c6d8c2e26a4515f5de18008473bd69

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