Malicious PDF — malware analysis report

Static analysis result for SHA-256 044d08ee49f765d7…

MALICIOUS

PDF

78.4 KB Created: 2021-07-14 06:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 69c32beb317690c70d5f1841b8cdec9b SHA-1: b3f030778e52d1da733360992cc0030e01f76ea6 SHA-256: 044d08ee49f765d718360cf17966366cff4f5d84c3c44ee770322e9ac2c704e0
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as 'Pdf.Phishing.Trojan'. While no executable scripts were extracted, the presence of embedded URLs and the nature of the detection suggest a phishing attempt. The PDF structure itself is also noted for duplicate object bodies, which can sometimes be used to obfuscate malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.1658

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/WVKuihPcy9U/square?utm_term=composition+of+two+functions+basic+calculator
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec76ae31b0b43e07e587b8/1626109614872/xibidokipotajofoxipewuj.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec9e9b7dc7460dd09d5d4e/1626119835882/gagavizutuvomududaset.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_off0000d1f9.bin
3ea6ef4c41ed527a34c915489249e4137447a0fd0c5195b7fcc007bf9cbe73cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F9 10868 bytes
font_01_sfnt_off0000eaf2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF2 16792 bytes
font_02_sfnt_off00010304.bin
4bb14efcf2655e0e101cb4c6968904c3c7597cd22c54d094a51d02f588d30d9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10304 16492 bytes

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