Malicious PDF — malware analysis report

Static analysis result for SHA-256 352f2e77e6a71b84…

MALICIOUS

PDF

104.0 KB Created: 2021-07-13 20:39:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c0b9e45ed350401fcbca46d7496aed57 SHA-1: 5cbbeb434942a9daa2488141733cf7f5ba71786f SHA-256: 352f2e77e6a71b84a2481f6aa710198c64aae4ca144c75f51e4bd0c6a5033928
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 phishing or trojan-like behavior. It contains an embedded URI pointing to 'https://irlanc.ru/square?utm_term=what+is+an+african+philosophy', which is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of the malicious URL strongly suggests a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5412

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://irlanc.ru/square?utm_term=what+is+an+african+philosophy
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed9e26cd0cb17c762ed444/1626185254265/grouped_frequency_distribution_table_generator.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecc41f2746a40efc743979/1626129439898/58762275812.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8fd61aa30721e65ed8f3d/1625881953573/87140817399.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e91a555fa2eb14b90b713b/1625889365848/vufozutotizudek.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_off000132f9.bin
3e7acd678086399b01e173c3f7376eee82ae1f0eb19d6ec3a28a577f29f393f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132F9 10552 bytes
font_01_sfnt_off00014b03.bin
25e25322b9644d79ddf2bd547b9bad35449d6892af07bf7ee79c5625ae563554		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B03 19524 bytes
font_02_sfnt_off00017c24.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17C24 16792 bytes

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