Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7e7f0b0b47993b…

MALICIOUS

PDF

120.0 KB Created: 2021-07-17 11:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5c4136cea6f162083ff03fa95769ab14 SHA-1: 27e6339047eb5b2ff3e8c1b16e4c71932ea2f131 SHA-256: da7e7f0b0b47993b317b9dd998e70f32f558e292dc79ba4dfcc5d10dad782229
96 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file was detected by ClamAV as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0', and an ML classifier also flagged it as malicious. The presence of embedded URLs, although marked as benign, suggests an attempt to redirect the user. The document body is heavily obfuscated and unreadable, indicating a likely attempt to conceal malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5124

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/jEScUJLm1bs/square?utm_term=approached+meaning+in+bengali
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f1733afe1af12ac2c69aa5/1626436411118/zuluw.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0a2d587912b671d1bb56d/1626383062324/nisibukiropujodarewaxof.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee8071df274736e0af5a31/1626243185519/days_in_the_lives_of_social_workers.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_off000173c9.bin
f6bcab275e066e156cf139682e92a8ea8fbeb821df7b389bc98822e0960c9019		 pdf-font-stream PDF embedded font (sfnt) at offset 0x173C9 10816 bytes
font_01_sfnt_off00018c07.bin
d726ba0936ae916551c0c5075a34bc9c75adc730b0349faeeef47ca5e0f852ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18C07 19008 bytes
font_02_sfnt_off0001bc73.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC73 16792 bytes

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