Malicious PDF — malware analysis report

Static analysis result for SHA-256 53a6c4b801665534…

MALICIOUS

PDF

83.0 KB Created: 2021-07-14 06:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0f9a4d871a3bb0031e6cdca9fb52a9e1 SHA-1: e41b4044217de441321fc1beaaa597502cab0446 SHA-256: 53a6c4b801665534edbf82939b4bad83de865173a2e54ca401c104eed87de843
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to lure the user to external resources. The PDF structure and embedded artifacts point towards an exploit delivery mechanism, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8584

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/NsX9ihectO0/square?utm_term=how+many+tranq+arrows+for+a+triceratops+ark
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e940b7025aa46e30d3de1b/1625899191381/cherokee_county_land_for_sale.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8a54a2d98337f05e1fedc/1625859402771/67263703903.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edc83480caa629c1d9ceb2/1626196020664/merry_go_round_of_life_guitar_tab.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edcf100229956bd132ba0a/1626197776749/98008797239.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee4450796bb0196c622333/1626227792260/59424807901.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee16d2c27d1e40a54764d8/1626216146227/how_to_delete_a_slide_from.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec97ade4ca3800a1196025/1626118061214/82203743215.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_off0000e0b1.bin
20e0eb46ba0dbfe5921d373181d82a179cc744cee065f190c5b3657468ccb8df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B1 16828 bytes
font_01_sfnt_off00010c95.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C95 16792 bytes
font_02_sfnt_off000124ac.bin
bcdd9f3323e81c2f592acccab7a180f832a594f93daf028bd86828b1ac81655d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124AC 11024 bytes

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