Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bd25b5de1cad45a…

MALICIOUS

PDF

76.0 KB Created: 2021-07-12 20:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 81e69e100aef60b1a57a26f24a63c953 SHA-1: 41f2adeadaaaf7482228714d8759af8ef055eafc SHA-256: 8bd25b5de1cad45a970b9b013f421bf62920a443c125ef30ea8b26673a663918
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect users to malicious sites or download further payloads. The PDF structure and embedded objects are consistent with common phishing or malware delivery techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7390

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/v-xubMviL4Y/square?utm_term=the+oogie+boogie+song
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec76ae31b0b43e07e587b8/1626109614872/xibidokipotajofoxipewuj.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e926f9c0906550d90b622a/1625892601397/23217875393.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec791359713006cbe03c05/1626110228029/15862668652.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e92d7ab9b95949b65f29a4/1625894266202/jolilusonudegipiza.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_off0000cb36.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB36 16792 bytes
font_01_sfnt_off0000e348.bin
080c89a97ccbd948521985a8cd9e76b5ff7d29f3e63b10248b8681d9a94feba2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE348 16520 bytes
font_02_sfnt_off00010e22.bin
6420b0a74a34c993ad14bd35f84c12768477b1a38c905b838a4c4104549d79ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E22 10084 bytes

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