Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5825eba231944a1…

MALICIOUS

PDF

74.6 KB Created: 2021-07-20 19:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 46154ef21fbf3f037f74066b3e36d002 SHA-1: 61102d6a152dd2ee3d000a5c0015306a184a2a76 SHA-256: d5825eba231944a1e4ee8504e89741b6fd79ec463f529d880fffd5bf48576ed7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF 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 domain, which is likely part of a phishing or scam campaign. The document body is heavily obfuscated, but the presence of the external URI suggests the primary goal is to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8028

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://drafthe.ru/square?utm_term=mcs+014+important+questions+with+answers
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec82dbc268f363b086a8c2/1626112731734/robomatenoxexesegomimuf.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e94112b9b95949b65fbce8/1625899282582/acoustica_mixcraft_8_registration_code_and_id_free.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7a5cd46a8e17713e1d9f3/1625793998076/physical_therapy_trivia_questions.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_off0000c20e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC20E 16792 bytes
font_01_sfnt_off0000da20.bin
91b67069e3f11f6e69a583c14b735d2b3b385caf7bcca859101efa27b9ed9431		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA20 16416 bytes
font_02_sfnt_off00010494.bin
bde0b852ddf6971981df3b603148dcb6c90de2755c47933e1a092a1cfd503b33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10494 11168 bytes

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