Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6922175348a678…

MALICIOUS

PDF

74.3 KB Created: 2021-07-17 06:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b7ace0ef73d734ad7257754faaf1b8c2 SHA-1: 7987088363eb09b809f9063ea9158e593f58fe5f SHA-256: ab6922175348a678bfd84518dc8ea81ee56a164a42c1356cbe0ebfeb2153c65e
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as 'Pdf.Phishing.Trojan'. The PDF contains embedded URLs, one of which points to a resource that was flagged as benign, but the overall context suggests a phishing attempt. While no scripts were directly extracted, the presence of embedded URIs and the ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.1751

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/~3/9xivtwLAy4k/square?utm_term=introduction+to+real+analysis+fourth+edition+solutions
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7a787726b430b4673f20/1626110584689/walufemu.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_off0000c127.bin
22c31b9ceb31f5e358eefd289215f44a971b272c05911c373395a02c2d8724bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC127 16640 bytes
font_01_sfnt_off0000ec98.bin
55b41d3861533250ff24f859830e6c3439647da60664888a7d75b313fab72d0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC98 10740 bytes
font_02_sfnt_off0001053c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1053C 16792 bytes

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