Malicious PDF — malware analysis report

Static analysis result for SHA-256 293b84d617dfb1ca…

MALICIOUS

PDF

73.6 KB Created: 2021-07-13 23:34:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9cf2d06626f2b153a0bc9ba0fdb07fed SHA-1: f3425b37240b713724b813e77232ebb65e7b0379 SHA-256: 293b84d617dfb1ca7e8c14e6f9f09663619c3b313253aa00db4dd65b9599ab91
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains an embedded URI that redirects to a suspicious domain, likely for phishing purposes. The PDF structure itself does not contain readable content, but the presence of the external URI and the ClamAV detection strongly indicate a malicious intent to lure users to a phishing site.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2592

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://cructi.ru/square?utm_term=aspiration+in+tagalog
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e9264e320dbd0de281387a/1625892430710/taxidimumabojuwejaxelit.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7d4525eabb22f35da5c5b/1625805906195/wheat_production_in_world_2020.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_off0000c0d6.bin
1c61b1e6658222a08c33f0c5ff575b5dfbdd558a8e6a5febd4f0c2a4e7b6b7c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D6 16548 bytes
font_01_sfnt_off0000ebb7.bin
1ac5cb7eca35064fb4d49a871ae27fa1df24f7006bd33c29e62be1877235faeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB7 10276 bytes
font_02_sfnt_off000102f9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102F9 16792 bytes

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