Malicious PDF — malware analysis report

Static analysis result for SHA-256 a672e796e596cb5b…

MALICIOUS

PDF

102.1 KB Created: 2021-07-16 00:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 829ae17e1b97df16c815d0b062e85aac SHA-1: 1e9341bd0257e207e9dcee86f2be166c6688d698 SHA-256: a672e796e596cb5b35cb1e99175d82ad9e443b000d8fde8a7458b44e62fcae84
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged the PDF as malicious. The document body is heavily obfuscated, but the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5412

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/square?utm_term=law+of+attraction+book+pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee5bf33753dc428c8a488c/1626233843546/gudewodoxaxukiwawifi.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8a5ad4b0a8d5efe5a1cb1/1625859501822/xawuw.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee1a24b82b3047685dabc5/1626216996539/sweatpants_and_baggy_shirt.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60eff3e3a26b2b69a35cb4d7/1626338275082/82121844497.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_off0001313d.bin
84ce2397f62d10bc60882d8aab3579e87136fd3592662f21757f47f5684534a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1313D 10544 bytes
font_01_sfnt_off00014939.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14939 16792 bytes
font_02_sfnt_off0001614b.bin
bee5d920d6d5884c8f6dff48c0d745870863a893a5a9678a9b9def28414db051		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1614B 16668 bytes

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