Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3a387a2ab36869…

MALICIOUS

PDF

82.5 KB Created: 2021-07-16 02:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 20eee2df8de0f9eeaee054a4b9148923 SHA-1: 1347b84aa223d1157b851f5cffc3c35dc6dca40a SHA-256: 8e3a387a2ab36869d4f7dd7c522c5267c9033f50c7669eac44d44aad46a782cd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An external URI, https://philabc.ru/square?utm_term=read+romancing+the+billionaire+online+free, was found embedded within the document, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of the malicious URL and the detection signatures point towards a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

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://philabc.ru/square?utm_term=read+romancing+the+billionaire+online+free
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee1e7a7dee9f188f764408/1626218106656/vuwoderuvunega.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f09bcab584796e0057198a/1626381258655/two_types_of_depreciation.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f04cbc6d647e461e71d65b/1626361020499/bidalolekiro.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee5298bb85ab7f02be4f4d/1626231448439/bootstrap_4_quiz_template_free.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0a1e9b4c9934d9589c7e4/1626382825487/26698176800.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_off0000e1c3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C3 16792 bytes
font_01_sfnt_off0000f9da.bin
ad3125f301693f5d61092f306a1610480751f6e0fbe3467d836375aef097b7bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DA 10940 bytes
font_02_sfnt_off000112b8.bin
a9fbb694c183e56b9f1b1de03dc8aedf43e6ae04da57c9a037d40ed265c6367a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112B8 16828 bytes

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