Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c22c029a655477…

MALICIOUS

PDF

78.6 KB Created: 2021-07-20 19:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e52dae106144abd7d5602e930bfefd5b SHA-1: f92381af7a2ba6458e52f8e5a0d60d0f01f33aa3 SHA-256: 56c22c029a655477674bbd73353bbcfff6b8f3547c2c2d6bb45c2f5d7b11af22
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a Google feedproxy URL which, despite its benign reputation, is part of a lure. The document body is heavily obfuscated, preventing a clear understanding of its direct payload, but the presence of the URI suggests a social engineering attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8755

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/iXsW93xxTQA/square?utm_term=shadow+of+the+tomb+raider+pc+torrent
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f24288d68f3225904e316f/1626489480663/mudumotepidakufi.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f6be70406ccd26e78dd855/1626783344328/the_girl_with_the_dragon_tattoo_2011_watch_online.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f3b43f1434f63547288f81/1626584127657/ios_store_on_android.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec92321951226b8b8bf865/1626116658712/wolf_and_dog_playing.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f20ec1ec922002f42a20ad/1626476225376/girotemolumudafimasotazab.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f393eae13ee976660b2b33/1626575850240/biology_chapter_3_study_guide.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e9096e8fb24157da6f1e11/1625885038850/download_full_movie_student_of_the_year_2.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_off0000d26e.bin
68db3981598304e9fec4e9b705f26bbf97aaf853fddca69df45227364455db80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD26E 16488 bytes
font_01_sfnt_off0000fd4c.bin
c3506eaf45a35ecb81e359a0b5415e6490c1c4508618365128b7fc6f517a65a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4C 10972 bytes
font_02_sfnt_off0001166b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1166B 16792 bytes

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