Malicious PDF — malware analysis report

Static analysis result for SHA-256 931ab6f40a2762fe…

MALICIOUS

PDF

83.2 KB Created: 2021-07-12 21:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6ed0ba9b46fbe83d7fd82784c237e903 SHA-1: 2826709503096bebd11da34e0de2232c344d19e3 SHA-256: 931ab6f40a2762fe7356c77af0309e54a0c20bb578edf53396820e4a5541a1ac
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains embedded URLs that likely lead to malicious content or phishing sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a harmful destination, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6049

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/~3/4Ji06Fp1PxY/square?utm_term=manifest+love+from+a+specific+person
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8058fa40056e74d1e384/1626112089150/yellow_fever_treatment_1800s.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8dd5243eac6055cf8ecd/1626115541182/73518724570.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8d61f4b4775d049fe70d/1626115425622/9056597371.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec78e567baa26076baac99/1626110181782/outstanding_notes_payable.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec860fa1f8f93f64ac0bff/1626113551170/burikixukuteworaxopewefez.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf3f.bin
7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3F 16312 bytes
font_01_sfnt_off0000e54a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE54A 16792 bytes
font_02_sfnt_off0000fd61.bin
c026d097a4974a88d061c67534b588ed05f87743dac5ea5a505cc17d04d3022c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD61 10700 bytes
font_03_sfnt_off000115f1.bin
656d38cd267b00eca5e4dd6e039e0a5e6b246314d202a69844c4eb47903277f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115F1 16392 bytes

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