Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3aba34f7bca795c…

MALICIOUS

PDF

76.9 KB Created: 2021-07-14 03:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0125efa91b2c15f80d225ff42e69d04b SHA-1: a0a7007253e600cc57d0162ae195b895f1c56edf SHA-256: e3aba34f7bca795ce8b2df8c8ca812f092541412e9681e3ca2a7bacfc12e8f32
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing attempt. The embedded URL, though marked as benign, suggests a potential lure to a malicious site. No scripts were extracted from this sample, limiting the analysis of its execution behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/um1bUVUAM38/square?utm_term=thanks+for+quick+response+email
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8e5d258c6623f037eeecc/1625875922265/most_abundant_gas_in_the_universe.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edc438b0089c62dc3b5c97/1626195000621/federal_unemployment_extension.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee2b4e86aa876280bb502b/1626221390707/12135126390.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed966e4325c5343bb8fd51/1626183278328/78013212413.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8176225441e1b37884fb6/1625823074308/celine_dion_songs_download_mp4_download_mp3.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee01272799685454fd108d/1626210599284/motion_in_two_dimension_notes.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e78bc8ce8457037ede0bd5/1625787336209/81421014739.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_off0000cba0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA0 16792 bytes
font_01_sfnt_off0000e3b2.bin
fb581da9a63653ad806b1de7771e3b371bcb8835862c5a119dfda689db11618a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B2 16148 bytes
font_02_sfnt_off00010cee.bin
b79a560abb8b11bc40ec263250813df6e50667068cccd94cdb17c99e19eacb81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEE 10948 bytes

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