Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e6583d5ea23b7e…

MALICIOUS

PDF

77.6 KB Created: 2021-07-15 22:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1f930fd30f36a8e376a7f5c4efa40c92 SHA-1: e141e9869d7200a41526e42e4f50ae2abd9473b4 SHA-256: 90e6583d5ea23b7e03f3ee0fc569d9f45542f7e182e58a6f79ac98226f33e53d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of an embedded URL, despite being labeled as confirmed benign, suggests a potential phishing or redirection vector. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall characteristics point towards a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7604

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/sq/ugae/~3/k6oGaauGqGM/square?utm_term=u+can+count+on+me+like
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7bd02dbc52028c83e0184/1625799938799/womenofiwosof.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e92e1ab630645a0ef7d72a/1625894426932/cold_process_soap_recipes_without_palm_oil.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e947d2c14ff043cd5e10ec/1625901010665/erosion_and_deforestation_are_both_caused_by.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_off0000cd0c.bin
3353f411dcf70fb1000cc7c4bb03a7250c3281a5fe0e20d3856e161f4f404f0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0C 17732 bytes
font_01_sfnt_off0000fbcf.bin
8293fbbf88b69f27f46ba156d702419e4411e8743864b8bb696c178e2ba556da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCF 10324 bytes
font_02_sfnt_off0001130e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1130E 16792 bytes

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