Malicious PDF — malware analysis report

Static analysis result for SHA-256 893ce910e655ee79…

MALICIOUS

PDF

74.0 KB Created: 2021-07-20 08:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5134c7956194c38733a0c496e0294724 SHA-1: 835546929e488cf8615f7f15322721c5659f3f28 SHA-256: 893ce910e655ee79d93cfd0456aa5b3ef77dfbf2e26f9f237d86c259bbebbbb3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains embedded URLs, some of which are associated with phishing lures. The obfuscated document body and the presence of external URIs suggest it is designed to trick users into visiting malicious sites or downloading further payloads. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7882

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/UZrB20b2Dcg/square?utm_term=cool+printable+pictures
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f048a2edd9820e692e5a77/1626359970496/you_re_always_be_in_my_heart.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee187a9c71001bedf304fd/1626216570673/41999525857.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee027a4ff81d3e2818173a/1626210938923/36510822240.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e942eb8ce0e10532d3b670/1625899755082/basic_of_financial_accounting.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_off0000c515.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC515 16792 bytes
font_01_sfnt_off0000dd2c.bin
a8156edac9d4766f654d6d8da37977d4e8e836a8b254a420c6a9c014dcf1aed7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2C 10640 bytes
font_02_sfnt_off0000f56c.bin
11ba6ce4a3663d344468211ba4536a576fd67b5c5b2b2ca8a1668512383c2215		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF56C 15272 bytes

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