Malicious PDF — malware analysis report

Static analysis result for SHA-256 65eb6697325938e2…

MALICIOUS

PDF

76.7 KB Created: 2021-07-13 23:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 33f9573e7694ccf0860624c5a4b6b5d7 SHA-1: 0e9fd4e81f8de5801bdc648d075e9cca4ad8391a SHA-256: 65eb6697325938e2416a324a8c0d7987ca97fd27250daf878f647a3e0b27422a
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 a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests a potential for phishing or the delivery of further malicious content. The file's structure also shows duplicate object bodies, which can sometimes be used to obfuscate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8907

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/eaN1Eb74jJI/square?utm_term=nyt+spinach+orzo
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e85083dc22a026a116e907/1625837701711/two_circles_are_congruent_if_they_have.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8c4a950202184f117cbd/1626115146311/which_is_more_polar_h2o_or_h2s.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edd4f780caa629c1db1c7c/1626199287685/37751013472.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8fa4a2c5c2f6215c767fd/1625881162652/constitution_of_england.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e9022dc14ff043cd5b9966/1625883182096/nakerirububip.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8d071c621d519eea60284/1625870449922/54472519534.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_off0000ca4d.bin
a44eae29564f44ee25a3c747bd7203d50e6aa8b2de711a43d063363440c4418b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4D 10444 bytes
font_01_sfnt_off0000e1fd.bin
e5c877653cd92c4834c199e735c469c3572732542842dcc5a3b1143407119847		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FD 16880 bytes
font_02_sfnt_off00010de2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE2 16792 bytes

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