Malicious PDF — malware analysis report

Static analysis result for SHA-256 8782771e7c4aa68c…

MALICIOUS

PDF

81.1 KB Created: 2021-07-13 21:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1dfde11bf0996f4e142aa903197675cd SHA-1: 06d2b6d750424c701acc317c17e037ff001623d5 SHA-256: 8782771e7c4aa68ce3d40fb5b4fa53c1e874c5e6ba2ca3b4f0e77638c448e5ff
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, indicating a phishing or trojan threat. It contains embedded URLs, one of which is a Google Feedproxy URL that redirects to a PDF file. While no scripts were explicitly extracted, the presence of embedded URLs and the ML/ClamAV detections suggest an attempt to direct the user to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8511

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/UQ8tT55rDuk/square?utm_term=read+the+bible+in+six+months
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec893aa3e9df788e6df48e/1626114362273/65221409088.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecac18f6fc466b5bf705e6/1626123288807/deviant_sexual_behavior_meaning.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7ba8f6e46386ca3becfb2/1625799311435/download_gameloop_for_call_of_duty.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7da97726b430b467a24f/1626111401761/45175793074.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edbe35e635d716645e4a56/1626193461452/jorivasovawi.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8d59e123eaa19f8fd0523/1625871774303/retaining_meaning_in_kannada.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_off0000d9c1.bin
a7e6cef72f69cf1b2666ce6b8de504fc3fa520f9d4d3c8d48f8df4497adca997		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C1 10700 bytes
font_01_sfnt_off0000f212.bin
fa64c3d34ab8ccca57fe9dd4cb04d5e6914f45cbce910063d0a7f766b47c7389		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF212 17724 bytes
font_02_sfnt_off00012072.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12072 16792 bytes

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