Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e7259ee198913e7…

MALICIOUS

PDF

76.5 KB Created: 2021-07-13 14:14:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a098edb3c22327d6a11cbdaebcc592f0 SHA-1: cd924c5e9131a811d347871a81007cb52d53092c SHA-256: 7e7259ee198913e74e69e493603e67321222e7e8ce8dc76cf744122b3d7e3b04
66 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan, indicating a malicious intent. Heuristics identified embedded URLs and potential object manipulation within the PDF structure. While the document body is heavily obfuscated and unreadable, the presence of these indicators suggests the file is designed to lure users into clicking malicious links or exploiting vulnerabilities.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/~3/4Ji06Fp1PxY/square?utm_term=parts+of+mixed+fraction
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e942a56e267257943be525/1625899685573/chart_for_celsius_to_fahrenheit_conversions.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e95bf96e267257943c9414/1625906169343/75369098684.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_off0000c874.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC874 16792 bytes
font_01_sfnt_off0000e08b.bin
07c48c10d246825d1a2c4dfbcd723b2066a78abf8963d2fdb2e39a1b1e2f9276		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE08B 10696 bytes
font_02_sfnt_off0000f91f.bin
ce70672bb1bd5db1c492f1231ae04064d2c59280fab2b5fe8bb0d69187c3fdf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF91F 17264 bytes

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