Malicious PDF — malware analysis report

Static analysis result for SHA-256 c945ad55578486ce…

MALICIOUS

PDF

82.7 KB Created: 2021-07-14 03:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1405fbbeffa20369c374ec1c88230159 SHA-1: 25fae82c0d4c05c0122cca099dec46d6343439a6 SHA-256: c945ad55578486ce5023d6483b7a01a30b7a8e0805f3f24658cf9d214a26a592
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains embedded URLs, suggesting it is designed to redirect users to malicious sites. The obfuscated document body and the presence of external URIs point towards a likely spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6221

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/v-xubMviL4Y/square?utm_term=lisa%27s+all+island+k9+services
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e81c7138ed220952b04133/1625824369253/spirit_break_out_william_mcdowell_chords.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee236c33d4654651bb7422/1626219372146/59544669592.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee1ddadf274736e0a94019/1626217946316/75464157859.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_off0000e1b8.bin
f03904b6bbaba53569507d581fbe4eccbeab834f1ac4918826eea124065233df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B8 17484 bytes
font_01_sfnt_off00010f50.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F50 16792 bytes
font_02_sfnt_off00012767.bin
cd92b2b2b82dc9fe69d08cfdda15562194b70c5b8d3fd43f8811f2a2e1bb3eaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12767 10464 bytes

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