PDF malware analysis — malicious · ad612c4d19a1ab28

MALICIOUS

PDF

76.2 KB Created: 2021-07-15 22:43:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 3b7042a2240889a3166ac3b9dea87c5b SHA-1: bf6cf3d00bbf42df6830481bc488dc23e0ff0e25 SHA-256: ad612c4d19a1ab286276c1118cb22bfc6fb581fa873f934c9f13ef42f6f3e003

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or trojan delivery mechanism. The presence of embedded URLs suggests an attempt to lure the user to external resources, potentially for downloading a secondary payload. The document body is heavily obfuscated and does not provide clear textual clues, but the overall structure and heuristic firings point towards exploitation.

Machine Learning

Nyx PDF Classifier malicious score 0.9680

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/CHqDoFjlE84/square?utm_term=c+minor+circle+of+fifths
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e84f7c05752f323cf0d5e3/1625837437009/pemogamonulutewefew.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7e5b72e2584f2462bac5/1626111580053/mimuzirakavipo.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec81ab31b0b43e07e6a3ff/1626112427115/consistent_system_of_equations_example.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec78914a8bde38c3437ec3/1626110097464/bavurorenipuruj.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee0847e7148d06bc6c88d1/1626212423654/rf_design_guide_systems_circuits_and_equations.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60efcdbbe00eb31d7cebc7d1/1626328507581/7962427584.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e93618b132fa3620743103/1625896472366/94282365532.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e88a3e3fd6951e3d194dff/1625852478944/justin_bieber_and_kendall.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c863.bin` `d4822e5c3ef6651b28fa03c5105e6498c57e9aad7c79a656da57ff7b83b6022c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC863	16604 bytes
`font_01_sfnt_off0000f399.bin` `b9007b53eef9ae68d152eb2b680b57370208de9fb7f7a99cbbb2e5e01b92e8d6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF399	10468 bytes
`font_02_sfnt_off00010b26.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B26	16792 bytes

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