Malicious PDF — malware analysis report

Static analysis result for SHA-256 084df1982e0ca622…

MALICIOUS

PDF

74.8 KB Created: 2021-07-16 20:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bb99a5a11aeaabae09836977f217e2c4 SHA-1: c7d9b220048a9e0f4c82c09a742995307dfa3f34 SHA-256: 084df1982e0ca62252b87a41b87059de2fad6cd6e1a80ae2a0a42671ebe1868c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://huntic.ru/square?utm_term=be+with+me', which is a strong indicator of a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI is sufficient evidence for the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9680

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://huntic.ru/square?utm_term=be+with+me
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f173e2d1d8e65aae899de9/1626436578429/bengali_meaning_of_ward.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7f235c244202458b0e57/1626111779191/powaxit.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60efcb77c0b35f4fb3d8d8eb/1626327927946/90488634919.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7ebc751cb2a526cfd4020/1625811911349/aldehyde_disinfectant_examples.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e95bd1025aa46e30d4929c/1625906130288/duditezedinokibuwubuvaxe.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ecba1710fbb85b140d7b3a/1626126871271/the_invisible_man_book_1952.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92aab92abcc18c4f6598f/1625893547577/7859688166.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e842d2f518dd358f6820d4/1625834194326/68673632762.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_off0000c5d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D7 16792 bytes
font_01_sfnt_off0000dded.bin
7e2b44903fe3df437a2b9bfb56492d68a98841367ab6d002111cda6c717ea4f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDED 9812 bytes
font_02_sfnt_off0000f378.bin
0812025bc5c37be1a43b941f9a079613ffc621b5c21ddc257a426be66a719839		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF378 17196 bytes

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