Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb394da2d2bded5…

MALICIOUS

PDF

73.7 KB Created: 2021-07-13 16:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: eeab9d7f8c74f4c2bcfe5ef2a8902a50 SHA-1: 0dc86bbdf577191e81cad909290a4f6268dc5aab SHA-256: 9fb394da2d2bded599cddb97b707dac5229c8d5a3546486920b65d04b48d4f4b
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as a phishing trojan. While the document body was heavily obfuscated and unreadable, the presence of embedded URLs, including one pointing to a PDF file on squarespace.com, suggests a phishing or malware distribution attempt. The PDF structure itself contains external URI references, which are often used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier clean score 0.1538

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/ZV5PD9BTPXI/square?utm_term=ancient+egyptian+peasants PDF link annotation
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e87b9e6584162e2d5ac56b/1625848734410/rokagozimanetupafekaxa.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3CF 15844 bytes
SHA-256: f77b76be4547f8159033cea1425000eed3918100525714d6c91dd2f05ef2a60c
font_01_sfnt_off0000ecc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000104de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DE 10376 bytes
SHA-256: f62d7beb9a7d5811aa7de8bc988ab232b72b06e3d4f746939f8e4485b8daf68f

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