Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6fb564949a9b228…

MALICIOUS

PDF

76.7 KB Created: 2021-07-16 03:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d5382320c555e41de3efbbb0e47880d SHA-1: 9a4a67cfafc69b04d9782829177ace403181e516 SHA-256: a6fb564949a9b228b1acb39fbc9433cb8109caf26d771e128da4d79bf083d771
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high probability of malicious intent. The presence of embedded URLs, even those initially marked as benign, suggests a potential phishing or credential harvesting attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and heuristic firings point towards a malicious PDF designed to exploit user trust.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/EjZ5HCEZs_A/square?utm_term=map+of+wildemount+critical+role
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8c24ab80adc27fb583927/1625866826422/network_topology_and_its_types.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8b8899ffc3426e8a3769d/1625864329909/eagle_scout_rank_application_2021.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0b72046c0d74f87d8690b/1626388257119/13741665573.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f02aece4fb0f110d7d96bd/1626352364610/9020634019.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee83a88feeeb055d9e04ba/1626244008712/lisavev.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60eda8c4a73a263c31e16eff/1626187973018/82573518241.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edf39dbf52576c6249562a/1626207133902/oaths_and_declarations_ordinance.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_off0000cac8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC8 16792 bytes
font_01_sfnt_off0000e2df.bin
ac0ec39e1db7f3db68681345deb3aeb939cf941f3ad144e7bbf58451e444f400		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DF 10792 bytes
font_02_sfnt_off0000fbbb.bin
82a36c30f32a58dd07fb1214481a43973acf3fa5da09a3fe066a3ad8db2525f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBB 16524 bytes

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