Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dd3730185f91fda…

MALICIOUS

PDF

167.0 KB Created: 2021-07-12 20:36:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 257a5d14e07fd3c3c6d2de6f7b085027 SHA-1: 21445922ae2d124c4854b717acd29115d0cc2cba SHA-256: 5dd3730185f91fda304cfdafac0501b4daec1d3e12f48c8a2389ee47d4e1d6e4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, though many are marked benign, suggests an attempt to redirect the user to external content. The PDF structure and heuristics indicate it is likely a phishing or malware delivery document, potentially leveraging embedded scripts for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5447

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/-7-cX3opz_8/square?utm_term=understanding+what+the+will+of+the+lord+is
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec783afe047727940a6cc5/1626110010098/stock_and_debtor_system_hire_purchase.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec798dff9c8b53cea162ab/1626110349933/tomawulixanenejorafep.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e87c7d163d09390fd8f2e0/1625848957480/how_do_i_add_screen_record_on_my_iphone.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7ce1851cb2a526cfc07a0/1625804312416/20137970336.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e86be442a7165951da429c/1625844708722/intermediate_2nd_year_zoology_textbook_free_download.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec720d31b0b43e07e512de/1626108429903/98537513924.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7997288cf71862a88476/1626110359641/nokoxuvavaxe.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_off00021cc0.bin
2ec2da4e8c5130addfd448d0106533f2215cca40a5e8de16ae90fe239a737fed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21CC0 29252 bytes
font_01_sfnt_off00025d37.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25D37 16792 bytes
font_02_sfnt_off0002754e.bin
196792b95d0b9a74b4bdce39e6a261ce2bb0b3100ac299d76029f6c4b1119651		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2754E 10724 bytes

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