Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae8d4c304763e4f…

MALICIOUS

PDF

37.0 KB Created: 2021-05-12 22:44:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 201e12e25e833bee02ce19db2c74c985 SHA-1: d3c59ff1672cd7bb6ea402a7c6ce306dfe350f6b SHA-256: eae8d4c304763e4f3a5c893a56897bf0d4ae96df767ffd51376f88a15e72e0a9
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link to a known malicious redirector infrastructure, which is designed to trick users into downloading a fake application. The document body also contains text related to a 'Coin Master Apk Hack', further reinforcing the lure. While no scripts were explicitly extracted, the PDF structure and malicious link strongly suggest an attempt to deliver a payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/coin-master-apk-hack-3.5.8-game-hack In 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_003_off00003692.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3692 24868 bytes
SHA-256: 388a297ae16779412d967f76369f6b047b4e2fe9425c57faaa24e65b46a6c6ba
font_01_sfnt_off00006e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E98 18476 bytes
SHA-256: b9b6adf449100deb59ed95ea3ad5e02aaf3681432d01b6b7dc02955a5f5017fc

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