Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c38ccc4a650a4c…

MALICIOUS

PDF

76.7 KB Created: 2021-07-21 11:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 73169944fa73b77912a14d9b47e0a920 SHA-1: 6616155b22545b8f7f37b8ef3bf636af5e6b6575 SHA-256: 40c38ccc4a650a4ca2fbfe1a4bb6d9b63cb829442e384f5f45ec94cd3d9e703e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which is flagged as potentially leading to malicious content, suggesting a phishing or credential harvesting attempt. No scripts were extracted, but the presence of embedded URLs and the overall detection suggest the document is designed to trick the user into navigating to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

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/sq/ugae/~3/WVKuihPcy9U/square?utm_term=new+jersey+product+liability+attorneys
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f7d1d9dea8142cbc2b43d0/1626853850203/82981464665.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f709b27533d46708de46ae/1626802610578/xulazinalujifokubof.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1a7d537fd3774141b862b/1626449877778/sexually_aroused_girl.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f3bcf925edf123065f3ed8/1626586361686/networking_devices_introduction.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_off0000c8df.bin
c6d767ec221828c9b49cae88c36d1afabd97297542ddbd73f902af5d5887b3b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DF 11056 bytes
font_01_sfnt_off0000e290.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE290 16792 bytes
font_02_sfnt_off0000faa2.bin
1a4b900cb61da4141371b46de4a551e57c5faac9f49d566b102725063ef7e93f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA2 16996 bytes

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