Malicious PDF — malware analysis report

Static analysis result for SHA-256 380bc5a438d1225d…

MALICIOUS

PDF

80.0 KB Created: 2021-07-13 15:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d78ef524cfa4bdeec5388efebcbdf7f3 SHA-1: 6048f80fb503e7c0c61b3492b23a55abb7964d1c SHA-256: 380bc5a438d1225d7f94c10aff4a7bee650f5a22a42e16b4c5699ebd1a6f75ef
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains embedded URLs pointing to external resources, suggesting an attempt to redirect the user to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8584

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/hIkXU_AiHkM/square?utm_term=past+year+bitsat+papers
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e95d7d787dde1a90afe7e7/1625906557401/60589350793.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7e6b1a3609a707bac8fab/1625810610417/zozagumiwapule.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec788cf89f8e700bf656f0/1626110092949/logapakovimagizo.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed763cdacdbe35d62a4367/1626175037009/resanatojitepe.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8cd6c426b81e830096bb/1626115286680/41221513337.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8bb0cd7702a4b9a6e8e46/1625864972391/fully_funded_scholarships_for_indian_students.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e83ad6f0b0395a876eca5b/1625832150914/validity_and_reliability_ppt.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_off0000d7bf.bin
3882cd9986713d115d1b66f7384a50539ce0f4c2b99221047e0ae9f3b62c6153		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BF 10232 bytes
font_01_sfnt_off0000eeb1.bin
a59cba03296fccdcfcc709ebd6877eb4cd2809e816b71705b6bac46731eed08c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB1 16848 bytes
font_02_sfnt_off00011a96.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A96 16792 bytes

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