Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd97ea6f9c7c2a4d…

MALICIOUS

PDF

109.5 KB Created: 2021-07-18 03:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5bdbc83ada3410f4b10ffe2aa8e4b3b2 SHA-1: 4d50910467050fc1b7f1b9dec727adedd5e1fdf6 SHA-256: fd97ea6f9c7c2a4d5089e7c097fbc4613311d67f27403006b8ea9a5ccc9d2023
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. The presence of embedded URLs, though marked as benign, suggests an attempt to redirect the user. The wkhtmltopdf authoring application and PDF structure are consistent with malicious documents designed to exploit vulnerabilities or deliver further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6270

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/gPkW7oTCsL0/square?utm_term=how+many+years+did+it+take+to+build+the+palace+of+versailles
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee170bdf274736e0a8bc08/1626216203380/nuwudimuxategusojer.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0028a7fedc2490c0a6739/1626342026689/pixanesun.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed06a05eed834fcc31ae86/1626146464596/specific_heat_problems_and_solutions.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_off00014875.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14875 16792 bytes
font_01_sfnt_off0001608c.bin
5db2771ddfa37684c6e9b42e5caa7d9d29b346bc915e36c785fd0e0ba8260707		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1608C 11476 bytes
font_02_sfnt_off00017b4b.bin
6eec93d970610e087766a8a28305b7a28172b6078f8e6484109e6cb12f5883e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17B4B 17156 bytes

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