Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d7c2d71cd2577c…

MALICIOUS

PDF

76.9 KB Created: 2021-07-16 18:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e831af46ae742ec10781c28dbee762cb SHA-1: 930f41f0dd78e148175d4c63f48ada8fb0c77d33 SHA-256: 62d7c2d71cd2577ca3532aa5c3f0164ed18d33687889b24351dc746fe340c770
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI that points to a suspicious Google feedproxy URL, which likely redirects to a malicious site. Although no executable scripts were extracted, the presence of the embedded URI and the heuristic firings strongly suggest a phishing attempt to redirect the user to a harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9001

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/HbdJGeoIq_s/square?utm_term=online+piano+with+octave+numbers
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f04982a1eac95336346004/1626360195319/letter_from_region_in_my_mind.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0d3507c30ad68c63a4b9b/1626395473041/gawesaw.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee17f739b8260338675514/1626216439921/tadevid.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f11e4944f13e0787b24e83/1626414665145/tesugizilomu.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f07864be875f230107fdab/1626372196885/wizatukikanejop.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_off0000ccfb.bin
258e54f85a1b3d27e0529a3060d53150faf00274d6f31d9581abe3c14277b098		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFB 15992 bytes
font_01_sfnt_off0000f64b.bin
1307b4f8cb5ee1526d526dad9e8cf908604e899dee55f507a5ed797c99d781f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF64B 11056 bytes
font_02_sfnt_off00010fb3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB3 16792 bytes

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