Malicious PDF — malware analysis report

Static analysis result for SHA-256 33cea7c809dec5a1…

MALICIOUS

PDF

75.7 KB Created: 2021-07-13 18:24:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5a54c4b5124f5bc943beafdf354eeaad SHA-1: 9964c5d37952343e55596e07c58619547317cdc6 SHA-256: 33cea7c809dec5a1ab58178bd78224618c34e30d50999ad2d24145e985f62403
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to 'wastran.ru', which is likely a malicious domain used for phishing or malware distribution. No scripts were extracted, but the presence of the malicious URI suggests an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7788

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://wastran.ru/square?utm_term=how+to+make+new+furnace+in+minecraft
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8de6bcf8be39b5060233/1626115558506/how_to_pray_for_my_pastor.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7feede8c3264fe5e8ddc/1626111982917/the_existential_self.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8925700aa07a789570dc/1626114341347/definition_of_causal_comparative_research.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_off0000c860.bin
666101561d6be1a372a5b3008e2593685e7b43eba7004c06b952e1268d08c528		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC860 16440 bytes
font_01_sfnt_off0000f30d.bin
46badb0d33acf9911a14734f0648a9f6bf552741bbaf23c3d6cd954f5071933e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF30D 10552 bytes
font_02_sfnt_off00010b1e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1E 16792 bytes

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