Malicious PDF — malware analysis report

Static analysis result for SHA-256 547070d5bf275b3a…

MALICIOUS

PDF

76.1 KB Created: 2021-07-12 20:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 04c97c3a9a85b790e58fe5fb0c53e3ff SHA-1: 4ea98cfaa61bc72ede7dfd2d48b0bd9a466ed568 SHA-256: 547070d5bf275b3a46302a62a01070ee4077ad8d5412a0d2eb1bc0df1accbeb5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a Google feed URL, which, despite its benign reputation, is likely used as a lure. The PDF structure itself shows signs of manipulation, such as duplicate object bodies. The primary attack vector appears to be social engineering via a malicious attachment, leading the user to a potentially compromised or deceptive link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

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/UQ8tT55rDuk/square?utm_term=anime+fighting+games+unblocked
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec71a10cf33f708d789246/1626108321578/webamefasufodefufudaxu.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec79393a853d606aeb5e48/1626110266036/33444439499.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8e0c9e6bd1231e60462db/1625874633602/litany_of_st_joseph_traditional.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_off0000ca2f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2F 16792 bytes
font_01_sfnt_off0000e241.bin
450f73b440fd1481f897be4322b667f5a00d831694b0d43cf844d148fce22264		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE241 15936 bytes
font_02_sfnt_off00010b4d.bin
f14047e231118beb18e313c862a828b9e25ab7a0a9c30de3f8fc558189825ae3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4D 11136 bytes

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