Malicious PDF — malware analysis report

Static analysis result for SHA-256 e51ef59065ac4e86…

MALICIOUS

PDF

74.6 KB Created: 2021-07-16 03:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 17d67e78dc7b784f707a26c1dae1deaf SHA-1: d9d7ab8add7df6cb8e843414aba8f024ba3edc9c SHA-256: e51ef59065ac4e86e6df19202283eccec19a4e51fa3b1369c7569e7cb0f0eaf4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically one pointing to a feedproxy service, suggests an attempt to redirect the user to a potentially harmful site. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt, likely leveraging social engineering to trick the user into visiting a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7788

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://feedproxy.google.com/~r/razvivatel/yapz/~3/UQ8tT55rDuk/square?utm_term=the+mambo+kings+play+songs+of+love+pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec853fcc9768212242e74c/1626113344059/can_you_go_to_uni_without_level_3.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f013c639c5d52effb75d29/1626346438598/53855685368.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e92930f4fe78435a3b0dbd/1625893168949/78811050720.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_off0000c0b9.bin
d14790e76fd8e637d3bd7e1f582aaa604dc119bb85b6bcd9d03f234fc3d7f7d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B9 11124 bytes
font_01_sfnt_off0000da15.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA15 16792 bytes
font_02_sfnt_off0000f227.bin
4e326d306d7bb05cc0c2d3119f3faa2a25d2d507a403317ee83696ad37ce4d20		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF227 17036 bytes

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