Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab1bd7cd2247cafd…

MALICIOUS

PDF

72.9 KB Created: 2021-07-13 01:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4a2e03612b0375fbffc4805072fb643a SHA-1: afa8dd0267bb7f54092fd7f0838911469d3eefc3 SHA-256: ab1bd7cd2247cafd5667b81d08ed7a9ef33226cd6727d96bf30028399405c4bd
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ClamAV heuristic identified this PDF as a phishing trojan. While the document body is heavily obfuscated, the presence of embedded URLs and the PDF_URI heuristic suggest an attempt to redirect the user to malicious content or download a secondary payload. The file's structure and the nature of the detected threat align with common phishing techniques delivered via PDF attachments.

Machine Learning

  • Nyx PDF Classifier clean score 0.1797

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/UQ8tT55rDuk/square?utm_term=significance+of+a+swan
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec78fd700aa07a7893b8fc/1626110205611/68939002031.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e92c105fa2eb14b90c2ee4/1625893904369/all_channel_communication_network.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_off0000c159.bin
52873f09f8e0050096446d4575bf751b2c83d0dbd360c3bdef0a63fce33190be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC159 15428 bytes
font_01_sfnt_off0000e87a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE87A 16792 bytes
font_02_sfnt_off00010091.bin
3d4f86962824b9ba5eece0f4d357f68895c450afa15274f1abe2c3a49d3f58d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10091 10428 bytes

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