Malicious PDF — malware analysis report

Static analysis result for SHA-256 db62126404395404…

MALICIOUS

PDF

107.7 KB Created: 2021-07-18 08:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3e554d73bc99c55bb5fda8b20674120e SHA-1: bc48ec4b8f7dc2a288d8edc4c2f5e9acc3e129a3 SHA-256: db6212640439540472e87a7129f4d2fb8fc3d9ce9f5373fc399c5e9a01b31cff
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains embedded URLs, one of which is https://feedproxy.google.com/~r/sq/ugae/~3/UQ8tT55rDuk/square?utm_term=how+to+find+integral+zeros+of+a+polynomial. While many extracted URLs are marked as benign, the presence of a high-confidence malicious classification suggests the document is designed to lead users to harmful content. No scripts were extracted, so the exact mechanism of payload delivery remains unclear.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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/UQ8tT55rDuk/square?utm_term=how+to+find+integral+zeros+of+a+polynomial
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edb8cb8525735ba0d4647c/1626192075393/75433329345.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0109afc6647025a37ba40/1626345626561/92650254854.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f1995ace10415791be55a5/1626446170706/gigiwigupijuropowipipax.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eca2b945711547b6a95152/1626120889374/dotesitogopezasape.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f24d485f13a15bd81421e3/1626492233068/pezetebuxifelopakakukali.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec930597282d6f46918ec5/1626116869952/ankle_block_anesthesia.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec8510a3e9df788e6d907a/1626113296639/sorojezupawitakopuliposix.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee3ae702e0767984f34d79/1626225383587/jexozarafu.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f17090425b7b741788bcce/1626435728951/dofitojeduwetupe.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9063a92abcc18c4f4d30f/1625884218163/jomipumigusetesibogi.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_off00013ced.bin
e979babc38bf6426dd0a8ba633fb4235118b0d0eb04746423bf51df4172a6a10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CED 11092 bytes
font_01_sfnt_off0001569f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1569F 16792 bytes
font_02_sfnt_off00016eb1.bin
3b4ddcbfd4b98f3b141b84a5a8bd4c80fcdc43d5c1f6a947d8b6a59e3133c0f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16EB1 18880 bytes

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