Malicious PDF — malware analysis report

Static analysis result for SHA-256 20be367f834ae495…

MALICIOUS

PDF

36.0 KB Created: 2021-05-22 20:15:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 87b867636f25db11937fbb11f4b70add SHA-1: 8ebe945d30ae66043214cdb69c02d82dfe55a399 SHA-256: 20be367f834ae495a4b93857eeb8289cec503b1522c95aaf42bc55f649e2a438
82 Risk Score

Malware Insights

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

The sample is a PDF document that contains a malicious URL and employs social engineering tactics, specifically a 'ClickFix' lure, to prompt the user to execute a command. This suggests the document is designed to bypass security measures and facilitate the download of a secondary payload. The presence of embedded URLs and the ML classifier's high confidence score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 4

  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/free-minecraft-maps-game-hack
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/how-to-hack-coin-master-spin-ios_GM406889139.pdf
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdf
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/coin-master-free-food_GM406889139.pdf
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/promo-code-free-robux_GM431946152.pdf
    • http://www.reyhanceliker.com.tr/theme/images/ckeditor/files/rbxdemon_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000034be.bin
5c7845a73075a530a667465f38f3d7171b2f95c4e6811c8688ba3992869f9d9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x34BE 24792 bytes
font_01_sfnt_off00006d4f.bin
642e76b92f67015eb87e7bb2f8978493590a3d76ebc6958dd5b149369a6bd5f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4F 17744 bytes

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