Malicious PDF — malware analysis report

Static analysis result for SHA-256 2baa64eb6d35a6a5…

MALICIOUS

PDF

115.2 KB Created: 2021-07-20 00:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 75f51a16e7537adaf9a2d647deb8dab8 SHA-1: e0040062d323338361ea7758c100c01ffc55d492 SHA-256: 2baa64eb6d35a6a5eb1b50c01f60f418f961f154ecaae5599d7f2e0cacba1c7f
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 redirect the user to malicious content. The wkhtmltopdf authoring application and PDF structure with duplicate objects point towards a potentially crafted exploit document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5640

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/mHcMeCcfVl0/square?utm_term=albino+with+violet+eyes
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8e81ff107ff2467e631ac/1625876511567/custom_binary_blocked_by_frp_lock_j2_without_pc.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8187dcef4a49b3aab8d1/1626112391602/lexicographically_meaning_in_c.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0df309627e70a9aca9ef5/1626398513126/michael_jager_astrophotography.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f284a12be78d526592d99e/1626506401347/vipizojefipevazuveka.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_off000163dc.bin
8a5002ff5f3eca2a9bf32408c620ae202919cdc92162f0f3710e5e5570dc489f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x163DC 10328 bytes
font_01_sfnt_off00017b2d.bin
8f326ba05e7fdd3160ad80d0c7efca299d4519e00d859bf5c23616408d3c838d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17B2D 17836 bytes
font_02_sfnt_off0001a944.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A944 16792 bytes

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