Malicious PDF — malware analysis report

Static analysis result for SHA-256 2156ce141f846a4d…

MALICIOUS

PDF

77.3 KB Created: 2021-07-19 01:37:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de710c0083d6b3ac3d01b4b8dd4db14b SHA-1: 0778b5e9128e3c824125078fcdaaa14d2e01f4b6 SHA-256: 2156ce141f846a4d187644f5e609f3b7783df8cb12b3639d68198f2ad804ce9d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains embedded external URIs that likely lead to malicious content or phishing pages. No scripts were extracted, but the presence of embedded URLs suggests an attempt to redirect the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8972

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/rCno-htTzZk/square?utm_term=price+of+1000+kg+gold
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f3f74580d83038fa88770b/1626601285558/tituxabalumavudi.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7c9d7dbb92d34f5add8be/1625803223344/13417378686.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec86365978cb5ccaab1399/1626113590229/notusumixoxoba.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee329b7426fb5109f3fdbf/1626223259345/tepepezesevo.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f201a079ed255f8b5bf073/1626472864702/1000_petabyte_is_equal_to.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec78b4fe047727940a7267/1626110132750/what_are_some_examples_of_sex_linked_traits.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_off0000cde1.bin
bf62e5caca92f9571fb7956c88b31bd5797b69c96b5c33384d134e976455b647		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE1 16892 bytes
font_01_sfnt_off0000fa03.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA03 16792 bytes
font_02_sfnt_off0001121a.bin
f47fc514664df13b16bdf00747a9a0571966b4b877b17f2a46c0ff48b6b7a2ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1121A 10384 bytes

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