Malicious PDF — malware analysis report

Static analysis result for SHA-256 89705580aac49741…

MALICIOUS

PDF

74.0 KB Created: 2021-07-13 21:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7db66f13d7294c16d3ac86f02d9a216b SHA-1: 7bbfeac283a2c6e3877de0679a12ab1e5d55e07f SHA-256: 89705580aac497415936bc055dbd5fca36fdc45fa3cae09b9cf29c192a96703f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious URL, likely intended for phishing or malware distribution. The PDF structure itself appears to be malformed, with duplicate object bodies, which is a common tactic in malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7882

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://huntic.ru/square?utm_term=heart+fluttered+meaning
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e94ea127127e6804173671/1625902754125/finite_element_method_lecture_notes.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8f430563c1506a8b423aa/1625879601072/words_that_have_x_in_them.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edd52936d51704235f801c/1626199337523/63293888371.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60eda400834e745de9d11e44/1626186752179/kuwivogiburamovigewovaga.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_off0000c2c9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C9 16792 bytes
font_01_sfnt_off0000dadb.bin
45dda445fd7136dd414c6a1643da532ce536734363bfa54cd4f7fb8ca5a5e503		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDADB 16220 bytes
font_02_sfnt_off000104bf.bin
e0461c5ced27317d876e44695906035c5c6c76064a53d9516ab877697b134086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104BF 10500 bytes

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