Malicious PDF — malware analysis report

Static analysis result for SHA-256 a543f6d9d74dfdc9…

MALICIOUS

PDF

90.2 KB Created: 2021-07-13 22:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: caebf9821ca1e87d271d73cf8c974060 SHA-1: 9459d1d8cd48eac243e057d34aa613559ed25fba SHA-256: a543f6d9d74dfdc9e07aec8c78cb583ec2900cb40e523fa74cd73efe72b2994c
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. It contains an embedded URI pointing to 'https://archism.ru/square?utm_term=mentions+of+the+devil+in+the+bible', which is likely a phishing lure. The PDF structure and embedded content suggest an attempt to redirect the user to this external site.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3957

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://archism.ru/square?utm_term=mentions+of+the+devil+in+the+bible
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8fc09c91b61347ea21af1/1625881609724/42208217482.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecb521786e7e037ecbed5e/1626125601732/craters_of_the_moon_state.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7ffc37d3b385c94b6f843/1625817027794/13264724333.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_off0000dffd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFD 16792 bytes
font_01_sfnt_off0000f80f.bin
108c784193818ce25b2e1703492e07dc810be7ad64d5178cb251678e9ec2ab42		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF80F 18764 bytes
font_02_sfnt_off000126e1.bin
9a3a4dd3d31a02d5467224782cfba60611043f7afe0a6fcea33fcce67f567904		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126E1 10388 bytes
font_03_sfnt_off00013e51.bin
374b7afa558e8a1ad7e203d1c5f151af367cdaa62c1481bfdfdbff7e98556dac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E51 18256 bytes

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