Malicious PDF — malware analysis report

Static analysis result for SHA-256 862dba7743fb1401…

MALICIOUS

PDF

76.7 KB Created: 2021-07-14 02:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 717f60a39c1043b0c94c95c772839dbe SHA-1: 7e7d9a155c0296bc9e2fc8d43223f68a72db614c SHA-256: 862dba7743fb140185505d2e792bccbf428a285aef3bd5fdc2b35ac47ca8a4e9
96 Risk Score

Malware Insights

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

The sample was identified as malicious by a ClamAV signature and an ML classifier, indicating it likely attempts to exploit PDF vulnerabilities. The presence of embedded URLs, though currently flagged as benign, suggests a potential phishing or credential harvesting attempt. No scripts were extracted, limiting the ability to determine the exact payload or execution method.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7604

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/UZrB20b2Dcg/square?utm_term=cooking+chicken+spatchcock
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60eca8045338e9546e4a9b90/1626122245142/13563791501.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee0a7faa539923b58225f2/1626212991469/desotokamazijesawawopamen.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7e6fa86d8930991a6d504/1625810682241/pefufox.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_off0000cc48.bin
1b89179c7373c982991ad645292a4342e16f4d9bcc47032024420bcd93d61a8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC48 10628 bytes
font_01_sfnt_off0000e4a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A2 16792 bytes
font_02_sfnt_off0000fcb4.bin
13eb4eac783498794a0d28610b788ea077c23477b5a87ea7b5f7bd1ac3368493		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB4 16540 bytes

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