Malicious PDF — malware analysis report

Static analysis result for SHA-256 abac262b89a41864…

MALICIOUS

PDF

74.4 KB Created: 2021-07-21 02:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 65d8d194b700ef02c2c51103c3c99191 SHA-1: ad620b572fa29a110b91f4c79b7f9c5692479188 SHA-256: abac262b89a4186414d5e255d3c53be1f85b43586cc1b5840238bb03c256c600
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The presence of embedded URLs, though marked as benign, suggests an attempt to lure the user to external resources. The file's structure and detection as a trojan indicate it likely exploits a vulnerability or uses social engineering to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8028

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/AnJPYMJXbyQ/square?utm_term=puppy+whining+at+night
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f60d3e3a8c3a2ffa48c018/1626737982697/sakowuxo.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8107eed7e630439665716/1625821310940/lacto_fermented_rice.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e87cdb33c3d3411a98e782/1625849052066/xasidon.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_off0000c5e1.bin
e477d27bb16fc7b6dd3a5cac5983895b9b9c8d6cb083daab2454205b80c6366b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E1 10264 bytes
font_01_sfnt_off0000dcef.bin
6276ad8347fb31a1007766018f4de65ee344b32c3c43c934b2683c848e607ed1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEF 15524 bytes
font_02_sfnt_off0001048a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1048A 16792 bytes

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