Malicious PDF — malware analysis report

Static analysis result for SHA-256 593a05d528c732d7…

MALICIOUS

PDF

76.1 KB Created: 2021-07-21 01:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f840fc7574334ecfa26a36e0e8951faa SHA-1: 51ce66fc1df5a54d49ed6062714d4d2b51fa1ef5 SHA-256: 593a05d528c732d72afc22e473925e0b4d8b4781bf33c38c3dc4c201142309c5
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 attempt or a downloader. The presence of embedded URLs suggests an attempt to redirect the user to malicious content or download further stages of an attack. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9125

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/razvivatel/yapz/~3/gOBB6uaVNRA/square?utm_term=frontier+gate+boost+psp
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e84a592d909c29a832b76c/1625836121989/voludetox.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee08801cf0e6777f2a5ae1/1626212480979/emergency_exit_plan_template.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f3cab032548145d78fcb38/1626589872962/height_weight_chart_female_in_stones.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0255f1b42e761db8a0b13/1626350943301/what_is_a_centralist_government.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f1d402525c7d2b6b30e529/1626461187091/baaghi_movie_download_tamil.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_off0000c7d5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D5 16792 bytes
font_01_sfnt_off0000dfe7.bin
8fa8d5ab8619832fe37401314b68a671e3ae07308e5b1734c0382a07279d2b65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE7 17144 bytes
font_02_sfnt_off00010cf3.bin
454bf1f2ba72aa3f6d74d7cd97cab2b0929d6d0dfbcca7c1db50091ad97b2508		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF3 10500 bytes

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