Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9fc0773094744b4…

MALICIOUS

PDF

123.5 KB Created: 2021-07-18 09:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 70d419a646ee127b0910a0f1db945140 SHA-1: 67c368a88ac7de2fa25eb66eb72123a603058d3d SHA-256: e9fc0773094744b4a50e5f5a74b72c731f6af8fb8b1f6fe363078584e410b34a
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as 'Pdf.Phishing.Trojan', indicating a malicious intent. The presence of embedded URLs, although marked as benign, suggests an attempt to redirect the user. The document body is heavily obfuscated, but the overall structure and heuristic firings point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier clean score 0.0904

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/NsX9ihectO0/square?utm_term=press+to+cobbler PDF link annotation
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f13792b238236d23338ad5/1626421139021/probability_and_statistics_viva_questions.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e86d58d91c407fc5751fea/1625845081213/federal_and_state_powers.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000186b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186B5 17736 bytes
SHA-256: b38d30159e69f865c39c23fb0da4b03351fe51bfc29a3067e0a2ece5b2fd6f4b
font_01_sfnt_off0001b569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B569 10004 bytes
SHA-256: 2f1d51ba437391b996d119e9ce558ab4b2acdbe7fd61ec3cf903f60b6c1e1a5b
font_02_sfnt_off0001cbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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