Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a7d35e368b05372…

MALICIOUS

PDF

75.7 KB Created: 2021-07-21 11:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 849d62a934eb99f447f34f49126aad50 SHA-1: eadaa99a0d936fd714bee57b62df18096335a7c2 SHA-256: 4a7d35e368b053723ae658020c9c979f8635118c0abde19d92b1c6d7fa54a2cc
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. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of an external URI suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

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://queure.ru/square?utm_term=how+to+get+allah+to+answer+your+prayers
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f040191c2a3138379203e3/1626357785964/xukazepabutujik.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f1e78a523e906533a6face/1626466186184/you_can_negotiate_anything_book.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f03b311b42e761db8b7e28/1626356529813/zaseku.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_off0000c7d0.bin
c328026a3f2f97db6a3795e75632ef9902c9713532977256fe7f53504c54f86d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D0 10728 bytes
font_01_sfnt_off0000e080.bin
0c1dd8592500face75a92b816f7e7362065ebb929d041b61f51822113e391742		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE080 16320 bytes
font_02_sfnt_off00010aa8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA8 16792 bytes

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