Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e51972570489850…

MALICIOUS

PDF

74.2 KB Created: 2021-07-12 20:10:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0ace9746f91928ada7b2375ba910d48a SHA-1: 0ad5ec1514c60334ac4cab3539ec8eaada93dff2 SHA-256: 2e51972570489850aa0379ed87d3ff6f6095ea138d2ba760f0c7624c5446872f
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. The presence of embedded URLs and the PDF structure suggest it is designed to lure users into clicking malicious links, likely for phishing purposes. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2686

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/nCRFBnYrBHY/square?utm_term=what+two+colors+make+blue
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8426e713f321619884fd4/1625834094892/internet_explorer_for_android.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec704c950202184f0e94eb/1626107980321/northeastern_commencement_2021.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_off0000c265.bin
804e6cb85147a3486a88c49f0d3cf8344fb598f4e8fc2ab4938a0a75f6e56cee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC265 16168 bytes
font_01_sfnt_off0000ec2f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2F 16792 bytes
font_02_sfnt_off00010446.bin
ef9dccfa9c1d7fedea11197e3edfbab8a60fa8b1173589476502a2c30e8f6d76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10446 10708 bytes

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