Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf75eacfdaea24e1…

MALICIOUS

PDF

81.0 KB Created: 2021-07-14 00:36:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c28654ad5cbe84cbd27cbedbf5b7a5d7 SHA-1: 6412705c739d494cb1e373db804480267b66f498 SHA-256: cf75eacfdaea24e1ce90b6906a671c87e003889065de61390e1bf73eff6c4f6f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The PDF contains embedded URLs that likely lead to malicious content or phishing pages. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit vulnerabilities or redirect users to malicious sites, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6198

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/CHqDoFjlE84/square?utm_term=lidia%27s+italian+meatloaf+with+ricotta
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7c2337be683581ce160e2/1625801267939/mamid.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec8f4377250868136dabbe/1626115907136/2pac_little_do_you_know.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8ae34c0b954f9ea4e5be/1626114787461/society_and_the_healthy_homosexual.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_off0000d9e5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E5 16792 bytes
font_01_sfnt_off0000f1f7.bin
956ddfeecf30aa606f72e225ee06a0270f62992594df4a0c474f32f1d3c154b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F7 17256 bytes
font_02_sfnt_off00011f47.bin
107e06c0ccd82e108a6c1f35bca443686622466233494e319eba2d6dc0631cf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F47 10816 bytes

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