Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d15e8da82c5224e…

MALICIOUS

PDF

74.0 KB Created: 2021-07-19 19:25:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b3da311d8bdc8837ec251c8468f921a7 SHA-1: ed0ab97ccef5490f2f8cc317781eb970182ca598 SHA-256: 9d15e8da82c5224e6eb011fc95a78b776cf3d323cfb4057cd0361a059fd9786a
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing attempt. The PDF contains embedded URLs, one of which is flagged as a potential phishing lure. While no scripts were explicitly extracted, the nature of PDF-based phishing often involves JavaScript to facilitate malicious actions.

Machine Learning

  • Nyx PDF Classifier clean score 0.1751

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/XMoLd4EPXkg/square?utm_term=advantages+of+controlled+rectifier+over+uncontrolled+rectifier
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edcf7610369373fd82697d/1626197878540/nudukibakupolomizudosamoj.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_off0000c1c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C8 16792 bytes
font_01_sfnt_off0000d9df.bin
24de7346ce52e8324139849175170ec070d8c17e57f509c7193baccb527ac46b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DF 10800 bytes
font_02_sfnt_off0000f2b9.bin
1c819a2d03201781a8eb6062ede905f60f6054a7a4614d98931511185362742d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B9 16056 bytes

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