Malicious PDF — malware analysis report

Static analysis result for SHA-256 77eb03e80fe6ca64…

MALICIOUS

PDF

75.5 KB Created: 2021-07-14 06:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e86649b8f789aa9a984f0e228de7bf77 SHA-1: fdf5d17a0bdc5ca48addee017ecdc28ecb989bd2 SHA-256: 77eb03e80fe6ca64561cef8c29e757074efdec3c0d34b8f2ed6750f50fe7d058
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a phishing trojan. The presence of embedded URLs, though currently classified as benign, suggests a potential lure or redirection mechanism. No scripts were extracted, but the file's structure and detection indicate it is designed to deceive the user, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6911

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/~3/1LSSs5qy-i4/square?utm_term=2021+convertibles+with+manual+transmission
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e940e82dabf272355568c7/1625899240123/91999141641.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ede4229779423221e0967c/1626203170780/64151027527.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee418c0981f36585a26372/1626227084597/how_many_cubic_inches_in_a_yard_of_concrete.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60eca89d0f7d8d50062f4e06/1626122397565/sumidutesadidexi.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_off0000c1e6.bin
b8e57b9065a3833d81ed6713438261cf86ff60ef9f708190f2afbfd711e35b89		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E6 16944 bytes
font_01_sfnt_off0000ee54.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE54 16792 bytes
font_02_sfnt_off0001066b.bin
f697c1c861974694e53583a809c19485d992e8dbd5c15fb72198bc4e05344fea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1066B 11084 bytes

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