Malicious PDF — malware analysis report

Static analysis result for SHA-256 0817f827aadfaf87…

MALICIOUS

PDF

76.3 KB Created: 2021-07-12 20:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9c183978946df666aa7457d6163ce7aa SHA-1: af12657fffb641e7b84695edb46046f6c474123c SHA-256: 0817f827aadfaf875e5a7bb0b1885eb7c97a13e929291e23e774406f5d33fb57
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs suggests an attempt to redirect the user to potentially harmful external resources. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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/qQn0o4eTdIQ/square?utm_term=french+in+action+audio+files
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec78f44027437375955fd3/1626110196583/58378128758.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e94ca9309bd63f3d875abc/1625902249954/sustainable_opportunities_acquisition_corp_news.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec714a2de9850677716f09/1626108234389/molecular_structure_of_the_cell_membrane.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7eb2cafd06e4982eb2930/1625811757083/xe_usd_to_rmb.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec71b25c24420245898f32/1626108338970/colors_for_cool_skin_tones.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e95b70b6736875596961a9/1625906032425/gikekopinoxotuvolarero.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8e255cc7c086459238e5e/1625875029819/movosoxekinolomemuzu.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec78b23f7a034ccb794ef7/1626110130654/33337588574.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7b1f41d61f435cef5b432/1625797108433/rasigilit.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_off0000cb47.bin
413130d858584503a0e617e422a989a1641d56728e97f1bf15b2eb7d56b59df3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB47 16004 bytes
font_01_sfnt_off0000f4ca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CA 16792 bytes
font_02_sfnt_off00010ce1.bin
e2b289e6be74977a6c5f8b4d0379241c48541fadc4c9582fd6528335bf3a5767		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE1 10648 bytes

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