Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fcdca3e9b0aa510…

MALICIOUS

PDF

76.5 KB Created: 2021-07-18 23:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 24349648d5548a18dee441f08771a0ee SHA-1: 9116b1618fcef39589d51bce445282370b826fd1 SHA-256: 5fcdca3e9b0aa5101351e4f9fc334e7a23f8b11cc1722b69947c4c32633ef393
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs that point to seemingly benign external resources, but the overall structure and detection indicate a malicious intent. No scripts were extracted, but the presence of embedded URLs suggests a potential redirection or download mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7604

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/UQ8tT55rDuk/square?utm_term=alfred+mccoy+political+caricatures+of+the+american+era+summary+pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f23335890fa5305bdbb18a/1626485557998/numerical_computation_in_science_and_engineering.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f30279bb7e64222df452d0/1626538617429/gezinimok.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee396ce9cbfe6c2fe7bd9b/1626225004520/printable_bookmarks_for_adults.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_off0000c982.bin
dfef8ecc9ae2dbcf686afc5e63b818a30e32363edd83494b9e022511708b3bdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC982 16384 bytes
font_01_sfnt_off0000f400.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF400 16792 bytes
font_02_sfnt_off00010c17.bin
aa084a40eaf591dcc838b3587fdac7fdea7ed6e167daecd21cf11d0428095006		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C17 11080 bytes

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