Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c5de1fe709757a5…

MALICIOUS

PDF

82.8 KB Created: 2021-07-18 00:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8b7da2655c802c1babd35dc82efcaf9a SHA-1: bddc6936499e73405f84f45e63854ca514ac39b4 SHA-256: 0c5de1fe709757a50ac32d425b7747de22f8bebac7e33ac951534cf4292365b7
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as a phishing trojan. An external URI was found embedded within the document, pointing to a Squarespace domain. While the specific URLs extracted are marked as benign, the presence of an embedded URI and the ClamAV detection strongly suggest a phishing or malware delivery attempt. No scripts were extracted, limiting the analysis of the exact payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier clean score 0.1717

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/cEZ-xJcQpFE/square?utm_term=married+first+then+fall+in+love+2021
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0778fd8d49b3972726e56/1626371983768/stress_physiology_in_plants.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8537fd2ae9d691971e05b/1625838463325/java_automatic_getter_setter.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e91a090cbdad4d35058811/1625889289533/52348367257.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c554.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC554 16792 bytes
font_01_sfnt_off0000dd66.bin
fb212dd82afc1c51083ac58ff15240162b90f17f5291cce462cedd76271a09c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD66 16400 bytes
font_02_sfnt_off000107ce.bin
45350e1f94efb758b6765ae291c1c86d53a6f768ee2a87b932a0a9833424756f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107CE 1752 bytes
font_03_sfnt_off00011016.bin
ab60e484d39670c09d966d59d0fed06d0f048ad2a674364fa557fc0c7f36616a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11016 16092 bytes
font_04_sfnt_off00012555.bin
139d044253bbe9dd79904113438ef71bc4acc40108575b97a252e57ac08b1dac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12555 10804 bytes

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