Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b2d4863db65966…

MALICIOUS

PDF

72.3 KB Created: 2021-07-17 10:36:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b764b11b46c1634786dc0265655d4399 SHA-1: 1b05f8d555b4a0d0d4e3922c4c52ec2879ac5078 SHA-256: 38b2d4863db65966a51dfef0ea34a05c73d9b4a9d781e773eba60d42abdf0604
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was identified as a malicious PDF by ClamAV with a high risk score, indicating it is likely a phishing or trojan delivery mechanism. The presence of embedded URLs, though many are marked as benign, suggests a potential for malicious redirection. The ML classifier also flagged the PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6030

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/cEZ-xJcQpFE/square?utm_term=use+duplicitous+in+a+sentence
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edbc9c1e342110cebdc436/1626193052607/relationship_trust_building_exercises.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0ec3ef75f957e35b41cf5/1626401854122/bidopawevaguwetasadita.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f224a2c375756552b21018/1626481826244/56664361725.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e922742c5c2f6215c90c06/1625891444784/hollywood_park_by_mikel_jollett.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_off0000bb77.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB77 16792 bytes
font_01_sfnt_off0000d38e.bin
e8d4f977998e9e9e29045e1e5a7b781130c1d7a593c6728a5789ae6a594217e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD38E 10512 bytes
font_02_sfnt_off0000eb8f.bin
183b12a34a509fe266a5942ada2d056baf55eecda8b09256ba5e07ee28a0b3e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8F 16260 bytes

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