Malicious PDF — malware analysis report

Static analysis result for SHA-256 13ffb5a27ca2413d…

MALICIOUS

PDF

72.8 KB Created: 2021-07-16 14:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d49351ec3f55e3028855081ff09dd3f4 SHA-1: c5925f714ce7a9d8a6c9fc9c40d76ebb582486ba SHA-256: 13ffb5a27ca2413d89a08664b18c94366bd8d86b7072339032e3f716a49228d7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and ML classifiers, indicating a phishing trojan. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious intent, likely related to phishing or malware delivery.

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=flat+zombie+cleanup+and+defense
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee6e8102e0767984f67a4b/1626238594004/pay_it_forward_effect.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e9388c566ded7d61ad81bc/1625897100330/a_far_cry_from_africa_summary.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ecf63bcdb2ce13c520b815/1626142267917/can_i_make_an_automatic_car_manual.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e857f0f785342ef887ee86/1625839600880/m_fakhry_davids.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_off0000ba7c.bin
92acf0220ab0d4636392593267e3278e53400bf440ba2b9dc87a1e493d9fa0b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA7C 10956 bytes
font_01_sfnt_off0000d3b5.bin
d987136b011fbaca92edeb4fe06df914e3d06e2e6db41e87eb2282ca43ab1083		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B5 16076 bytes
font_02_sfnt_off0000fd76.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD76 16792 bytes

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