Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c52f8e88ee601c…

MALICIOUS

PDF

78.1 KB Created: 2021-07-12 22:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a1a1b04f3efdbcf852517240b809edae SHA-1: d9448e94b814978975e47cc8849eb4313b381b01 SHA-256: f1c52f8e88ee601c3a0e4d92614b39a04a0721ecf536cd71251211fb82d0e252
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. ClamAV also detected it as a phishing trojan. The embedded URL likely leads to a phishing or malware distribution site, attempting to trick the user into downloading further malicious content or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6556

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://philabc.ru/square?utm_term=best+photo+viewer+for+pc
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e93b57b132fa36207460dd/1625897815427/movie_theater_in_georgetown_tx.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8f430563c1506a8b423aa/1625879601072/words_that_have_x_in_them.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec918d90a3fc49531a743a/1626116493847/how_to_find_a_sentence_in_a.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_off0000d0b7.bin
7f946fefa150264d6205c52dcf77d10f1610cc3a5ec829e582988f675441b0d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B7 10468 bytes
font_01_sfnt_off0000e8ca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CA 16792 bytes
font_02_sfnt_off000100dc.bin
5b72633033ed8bda2f094896d8ae21c98a46fb5c4d92cc51f704b8bbf6aed6f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100DC 16868 bytes

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