Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2263a64ac21b844…

MALICIOUS

PDF

98.0 KB Created: 2021-07-16 00:12:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 69b9837d545dd084e1552a6dfb0d5b62 SHA-1: 6f03994fac3ab3abddd79e074dfab61c89cc67e6 SHA-256: d2263a64ac21b844461b2cd3a1a363793ab2535e1cd434eccfa5f2ddaf0d42eb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to lure users to malicious content. The obfuscated document body and PDF structure further support a malicious intent, likely involving the execution of embedded scripts or exploitation of PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7887

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://feedproxy.google.com/~r/sq/ugae/~3/IdU8rIDf9lQ/square?utm_term=colosseum+is+located+in
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0a4ae0bad731156074007/1626383534582/52172531454.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee13184d490f67274ebccc/1626215192423/6849258148.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0a4523a4a34189bd05185/1626383442327/66347360421.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7ca0e7d3b385c94b4ce11/1625803278427/toefl_integrated_writing_practice_examples.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ecd5b1ccf7306dfd767c4a/1626133937866/medical_term_meatus.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_off00011ee4.bin
16b85595c5b225f8fbdd1607ffbd56bdd37ccb67888159936b1c85a2d7abe60c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE4 10560 bytes
font_01_sfnt_off000136f8.bin
fa555fabe9bd86dd056b473b87554561ee067ab5f9ca7adbc91754ec8b80c26a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136F8 17384 bytes
font_02_sfnt_off00016434.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16434 16792 bytes

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