Malicious PDF — malware analysis report

Static analysis result for SHA-256 252ada2cf642186f…

MALICIOUS

PDF

76.5 KB Created: 2021-07-13 12:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 296d6ce183407fd8b1f51fad1383c0b2 SHA-1: 5551cfcbeaa372cfb0e6c43c5d48ef6b4b6c2409 SHA-256: 252ada2cf642186ff6eb3355560a69010897c02961070722ec1d5825f1e11075
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'garglob.ru', which is presented as a free download for a video screen recorder. This suggests a social engineering tactic to trick users into downloading malware. No scripts were extracted, but the presence of the malicious URL and the phishing detection strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9125

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://garglob.ru/square?utm_term=free+download+video+screen+recorder+for+pc
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec92aeb3b63f0898f32cf3/1626116782435/jotiwovuk.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8f607563c1506a8b439ab/1625880071459/kovozenewaviroviv.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e9562b566ded7d61ae35e0/1625904683635/cyrus_the_great_tomb.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e900382dabf2723552e6f1/1625882680577/vabijedixidanozebud.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e861be732d3c6921e98040/1625842110352/a_quadrilateral_with_rotational_symmetry_of_order_more_than_1_but_no_line_symmetry.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_off0000ce63.bin
744ea0a96e6c4b4c47cbcf85f658bf02f4914b5134a80d04e4842f3eb6d213f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE63 15260 bytes
font_01_sfnt_off0000f54d.bin
d2c6219c3ad8d45eff691975a6e43a4b0a832c7ddc30d36e55b442801f783f07		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF54D 10644 bytes
font_02_sfnt_off00010dcd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCD 16792 bytes

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