Malicious PDF — malware analysis report

Static analysis result for SHA-256 e522c76e4ace9eff…

MALICIOUS

PDF

79.6 KB Created: 2021-07-14 00:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 170b839371e4623d43980d25b655102a SHA-1: e119057f90734a424297b7710ece928ee10bc31d SHA-256: e522c76e4ace9effc5020503d3013280a751f12d567a5950eb10da7176784229
66 Risk Score

Malware Insights

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

The ClamAV heuristic identified this PDF as 'Pdf.Phishing.Trojan-d2568dad23a94d95', indicating a malicious intent. While the document body is heavily obfuscated and unreadable, the presence of embedded URLs and the ClamAV detection strongly suggest a phishing or malware delivery attempt. The file's structure and embedded content likely exploit PDF vulnerabilities to execute malicious code.

Machine Learning

  • Nyx PDF Classifier clean score 0.1467

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/y83TWYo-3DA/square?utm_term=great+female+mathematicians
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e90b5c787dde1a90ad3861/1625885532489/do_you_have_to_train_a_cat_to_use_the_litter_box.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee0163a0f2ca3483d5dd6a/1626210659574/dunipizudepupufudus.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_off0000d7e1.bin
bc8420165a3dee5b07182161270948c11c2b4a89367527778738a67d8a6c6cab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E1 10520 bytes
font_01_sfnt_off0000ef9a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9A 16792 bytes
font_02_sfnt_off000107ac.bin
181ad3b307ce159a41ac2cd3c3abe22d73632e0ee2ceeee0dbdc6c130363cd16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107AC 16984 bytes

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