Malicious PDF — malware analysis report

Static analysis result for SHA-256 72bae8dbcae56013…

MALICIOUS

PDF

37.7 KB Created: 2021-05-10 11:48:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8b6e71192b970729b1d3ef3d7da90506 SHA-1: 64be57dbf75c8a80ba1ecae11b1cbdc8241a5988 SHA-256: 72bae8dbcae560138f3495ec8188fd26235bc191312f8a36262e18ea0195e79a
72 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure related to "Coin Master Hacks Reddit" and a prominent call-to-action to click a link for a generator. This strongly suggests a phishing or credential harvesting attempt. The embedded URL points to a suspicious domain, likely serving as the landing page for the scam. No scripts were extracted, but the document structure and embedded URI indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

Heuristics 4

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/406889139/coin-master-hacks-reddit-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000036bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36BD 26260 bytes
SHA-256: c74d3fba77560b143e7aa6118805b3c2f16ef4f6e622ea0558d831235e86edec
font_01_sfnt_off00007343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7343 17888 bytes
SHA-256: 63a6a5d9916b9ee5af7207625cec6907b74dd50493b17e0c9eae8777c3cfd91e

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