Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eeca3868d0f66b0…

MALICIOUS

PDF

92.8 KB Created: 2021-07-15 18:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bbbb5dd747d33a0bf0fa4fbf8fa7e121 SHA-1: 83e7a8998a08ccb5ce76edd13375121c0a8cd025 SHA-256: 1eeca3868d0f66b0f5cb83cc0ecbc5ff1c905b294e6153531237285bc9918d2f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The presence of embedded URLs suggests an attempt to redirect the user to malicious content. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8172

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/~3/1LSSs5qy-i4/square?utm_term=witch+hunter+vermintide
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7d79952059f1ec1e41393/1625806745676/i_am_number_four_full_movie_download_in_telugu.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ecb2df96fb1e5d2b5ed639/1626125023253/journal_article_about_education.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0247d5740a719f4adee61/1626350718184/pativifewa.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8849ad5f0753ec0a52adb/1625851034667/different_types_of_stewardship_in_religious_education.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8a5a837faa230262289f8/1625859497003/crept_meaning_in_bengali.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_off00010908.bin
79006375ee854d761ab80c5973cc01dc641de3f9bec629119b2414c90a3cf0dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10908 17880 bytes
font_01_sfnt_off0001383f.bin
380557321f8a274ea86d2306c78b92c590eb9b6e933a3d526cb63c7128bb76b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1383F 10300 bytes
font_02_sfnt_off00014f3f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F3F 16792 bytes

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