Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e9dddb8d9e1e1db…

MALICIOUS

PDF

81.2 KB Created: 2021-07-14 00:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 94cc6e8c6435e3d3975ecde6fc39a61f SHA-1: 874b17f60b4d40bed8e0131b3eae44274a1653ea SHA-256: 8e9dddb8d9e1e1db691add864116a72fa4f7306736cb0dba197e15b21834ad3d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, although many are confirmed benign, suggests an attempt to lure the user to external resources. The file's structure and heuristic firings point towards an exploit or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

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/aauXj3bnHUA/square?utm_term=cathedral+ranges+camping
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ede0fc895aae42f65a796c/1626202364320/south_african_folklore_stories.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec9034a1b53f2c225ea54e/1626116148946/23136437774.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7c139872c4c6263c3bab2/1625801018075/dry_rub_for_chicken_wings_air_fryer.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7967546a8e17713e0d638/1625790069127/why_is_my_excel_file_not_saving.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee01ce36d517042363f7b2/1626210767069/pert_cpm_for_building_construction.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_off0000dcaf.bin
ce83f9dbb3102416675e677d4a9fe92803d7ee840abc7e2576a2fb67c034a98c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAF 16852 bytes
font_01_sfnt_off0001085e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1085E 16792 bytes
font_02_sfnt_off00012075.bin
920530723744b5dc8f055c2a57f65a4e40e1f0210d3e53e0fa4fa22fa2f31124		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12075 10872 bytes

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