Malicious PDF — malware analysis report

Static analysis result for SHA-256 80bb74a436078e0d…

MALICIOUS

PDF

74.6 KB Created: 2021-07-17 04:35:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1a5e49604eced7aa76e71b784ab684de SHA-1: 3e0fcef0e96e2467a836b39bb2d33f2f905cfe62 SHA-256: 80bb74a436078e0dddff0333997a4258c5a8c79873d890c27708c20fc2f3a23a
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. It contains embedded URLs, one of which is flagged as a potential phishing lure. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2593

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/pL_UGxDroB4/square?utm_term=pdf+breaking+pages
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e77eae61166b169c483e5d/1625783983239/jedojenasenowuvotakose.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f17a572606b657d35a787d/1626438231842/miami_hurricanes_football_2021_schedule.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_off0000c440.bin
6140b51a7a36ac83295d9cac2c871404e0dd7d87efa77490307848823391c924		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC440 16444 bytes
font_01_sfnt_off0000ef0a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0A 16792 bytes
font_02_sfnt_off00010721.bin
2f93c0146d7d8d4226dedc6cd5c8e08049959692c9da7cfbc38df26135905a47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10721 10640 bytes

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