Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa380c7e03610f6…

MALICIOUS

PDF

40.0 KB Created: 2021-05-12 06:08:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8a6643a8eca4c1a789b55c1302a41b9b SHA-1: 7facd3b174a11288e8953aa3d638a0a280d89aa2 SHA-256: bfa380c7e03610f66ef972edcdd561831f0d5df8b0ea09114cb41f87686c8c28
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link pointing to a suspicious URL. The document body, though heavily obfuscated, contains references to the same URL. The presence of a 'download button' heuristic further supports the interpretation that the document is designed to trick the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/com.app-trek.free-coin-spin.daily-link-master-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000358a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x358A 25668 bytes
SHA-256: f45d313626d8c364b38e0993ba2c768841160eccbf85817795e7465510fea78d
font_01_sfnt_off00006eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEC 3204 bytes
SHA-256: 8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
font_02_sfnt_off000079f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79F0 18648 bytes
SHA-256: 4245de8225c13a7c43c864f554b6c2d5cb407c581c89996f8044c22da6d98c63

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