Malicious PDF — malware analysis report

Static analysis result for SHA-256 c63a80629a4a8c84…

MALICIOUS

PDF

75.8 KB Created: 2021-07-14 00:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 503f69e911609078d0915949aee655c0 SHA-1: f65d2c006c53ea4c0932c5670b6e937b3efa8347 SHA-256: c63a80629a4a8c8486c8f07f48d6631cda06944020d455e8e7486d2ac54ad4c7
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. The PDF contains an embedded URI pointing to a URL that, while currently flagged as benign, is indicative of a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the URI and the ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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/-MXWpcYQ7kA/square?utm_term=game+of+thrones+new+series+2020
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8c22fc3dba77ad33545bb/1625866799699/dentistry_interview_questions_and_answers_with_full_explanations.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e929e783ae0c490239664c/1625893352090/lavegog.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_off0000cb01.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB01 16792 bytes
font_01_sfnt_off0000e313.bin
5c4069f801ed196891af1619574df5ff9877c06c4844233d8a8ebee148214745		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE313 15604 bytes
font_02_sfnt_off00010ad9.bin
0c7ca8b7d455164a78b123588552f5a53f678a7a8b659ec680e23369ac17a453		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD9 10800 bytes

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