Malicious PDF — malware analysis report

Static analysis result for SHA-256 f162217835903805…

MALICIOUS

PDF

76.5 KB Created: 2021-07-18 08:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 533fc8d4c30af0e65680f0d150c8bc1d SHA-1: 27821c96436f0a934d294e68c587ee3446dc9594 SHA-256: f1622178359038053a6c32f564f2158eecb3a3ff3073da5ae97a473f6f58aec0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The embedded URL, while confirmed benign in reputation, points to a lure related to 'stardew valley gifts leah', suggesting a social engineering pretext. No scripts were extracted, and the document body was truncated, limiting further analysis of the payload's intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7604

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/-MXWpcYQ7kA/square?utm_term=stardew+valley+gifts+leah
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e93871e6a58043b6925b18/1625897073197/bisawixixobiva.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8ef1c0a287971af97c321/1625878300834/fanibasa.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f05b064381433ecec53489/1626364678540/long_division_problems_polynomials.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_off0000cccc.bin
2f119bc45d5b09d89fc44cc8f3a5f5ed82fc14a5e605abe910050ed951cc8c5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCC 10748 bytes
font_01_sfnt_off0000e578.bin
363f5b93d526bf198a19d43c4e1ba75e08b3c58d4f24312c878e2c907d8c1c05		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE578 15940 bytes
font_02_sfnt_off00010e6a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6A 16792 bytes

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