Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b0d402303d5b47…

MALICIOUS

PDF

75.3 KB Created: 2021-07-13 17:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9c6490c9feb1390e0c744695fc071a9f SHA-1: e06e4a50d71718575270cd36ca542984b122ba0b SHA-256: b8b0d402303d5b474969dbb94125b0161d95d57c7ccff619bebc76fecfe5ac85
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of an embedded URL, specifically `https://feedproxy.google.com/~r/sq/ugae/~3/5Aj-mlxkUx8/square?utm_term=transfer+money+from+nro+to+nre`, suggests a phishing or social engineering attack. While no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8972

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/~3/5Aj-mlxkUx8/square?utm_term=transfer+money+from+nro+to+nre
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e822f66e46386ca3c37c87/1625826038568/20201800396.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec791ec217102653d51204/1626110238476/9510440833.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7a81485664d35b0e4b2d4/1625794580724/infiltrating_moderately_differentiated_adenocarcinoma.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec99bce0914637f38ceab0/1626118588292/zodufofilageziwegolagebu.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec809c4c0b954f9ea3dff1/1626112156749/product_image_gallery.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e9317b5fa2eb14b90c5d88/1625895291096/xosiruvofamifezejo.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_off0000c85a.bin
62a4143952924150b0ebc2436f72daa2fe0bcb0b82dddede861ee3dfa4faf279		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC85A 10312 bytes
font_01_sfnt_off0000dfa5.bin
9335b0bd538a825a12738e306983753473521c9357e675f044b5567742f91423		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA5 16140 bytes
font_02_sfnt_off00010970.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10970 16792 bytes

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