Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a97613e8898f7a6…

MALICIOUS

PDF

81.4 KB Created: 2021-07-13 17:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 421f5a78a57d0dcb7e8c392f56b6494d SHA-1: 8c60030c7737e03c0723c8b9e3906b7ceb282ce5 SHA-256: 7a97613e8898f7a69758a5b4ec6b5889f610f94987c36a40b95b4fcf7954e8cf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI that points to a URL disguised as a document title, likely intended to trick the user into clicking it. No scripts were extracted, but the presence of an embedded URI suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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/S-4CHg4Qmwo/square?utm_term=engineering+your+future+9th+edition+pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e877ce3249a603870a54d5/1625847758993/sinead_moriarty_seven_letters.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60eda889c8cbd011b90ce1a7/1626187913270/xajinabavopodujurukaxi.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed8c240318596fdcc503c0/1626180645427/if_an_alpha_particle_and_a_proton_are_accelerated.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8fa74b6736875596627e1/1625881204589/border_collie_drawing.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_off0000db97.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB97 16792 bytes
font_01_sfnt_off0000f3a9.bin
6ceb6af8217d1cb6291085001637843a44884da9d80100f9b2f58660e347230d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A9 17420 bytes
font_02_sfnt_off00012145.bin
8d23b1b81dd3dbcce07bd743f9b14f3a9a628f49f9ff9def5e6aa1d8417f4d8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12145 10764 bytes

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