Malicious PDF — malware analysis report

Static analysis result for SHA-256 188d823ee0a7f3c2…

MALICIOUS

PDF

77.1 KB Created: 2021-07-20 00:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a60c0b4538ee45814ce4bae75fae607f SHA-1: ff6da886344543e711160a281c571093c293d911 SHA-256: 188d823ee0a7f3c2eabff7d4d0a7c7c1a586cae7100d3c0e54a321f539cb8553
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The PDF contains embedded URLs that likely lead to malicious content or further stages of an attack. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to exploit vulnerabilities or trick the user into navigating to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9125

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/~3/4aHNpQc2m6I/square?utm_term=free+printable+letter+a+worksheets+for+preschoolers
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edefbb2e8a4a2aca7be660/1626206139181/12099299276.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee8c3b4d490f6727564ddc/1626246203793/natural_features_of_ancient_egypt.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f57d2981f38b2058a064f1/1626701097878/piboxon.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f36e4d4f27972c60422645/1626566221430/14452024997.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8d09810585815137646a2/1625870489011/8080606646.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_off0000cc54.bin
88a75191aeca545cd61cda4ff27427c39381db1309b815f4bb3d18ddb70a279d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC54 16492 bytes
font_01_sfnt_off0000f73b.bin
a37dd7782606257039a8dd50c8209ad4990b137626bf90745289d27b6890b136		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF73B 10872 bytes
font_02_sfnt_off0001101e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1101E 16792 bytes

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