Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e93e0cd027e2bd…

MALICIOUS

PDF

81.4 KB Created: 2021-07-15 10:11:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f68febf3f3d7525b45ff28427baccc0e SHA-1: 21ed015ae14f68a08f04c7bf32f42213af6dd1aa SHA-256: 94e93e0cd027e2bd82489db4ab7586251f89e2c41bd0b47a7a380e783ead8ca8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URI that points to a Google feedproxy URL, which in turn redirects to a Squarespace hosted PDF. This suggests a phishing attempt or a lure to a malicious site. No scripts were extracted, but the PDF structure itself contained the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9031

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://feedproxy.google.com/~r/razvivatel/yapz/~3/7R6buoffwiA/square?utm_term=how+to+push+new+branch+git
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edd0b13be50f2c5dac32c0/1626198193781/sherlock_holmes_and_the_sign_of_four.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee00c62e8a4a2aca7de1e4/1626210502848/3444819789.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec79ef288cf71862a89574/1626110447095/geropetemalapowaw.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec83f2b8cbe518df57cd59/1626113010471/fasum.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edd2d1537dfa200403741a/1626198737308/old_country_love_songs_from_the_60s.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edbbb55f3ccf7ebe278342/1626192821408/83390368929.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7f74fbab0621613397ec6/1625814863412/compel_meaning_in_telugu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8af.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AF 16792 bytes
font_01_sfnt_off0000f0c6.bin
b7e44ddd50b2a618a5e2221a4186612e61e75ac076239c76eea369d7726d1be2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C6 10924 bytes
font_02_sfnt_off000109de.bin
552df42f784e28cf90bb4cfd518cddf5c1a3a2b216de58999dfc6e0aa1a2a197		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109DE 17892 bytes

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