Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b7430a2ebc352be…

MALICIOUS

PDF

75.5 KB Created: 2021-07-20 22:18:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3f4892dac2d6576e294bff1c32c3de61 SHA-1: e9ca4b32416542c7b62d5d24263237303da3fc60 SHA-256: 3b7430a2ebc352bed435d514970198f256e649677ede0d3352b6251c042bbf7c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains embedded URLs that appear to be related to software downloads, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the presence of embedded URIs and the overall detection by security tools indicate a malicious intent to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

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/eoPDrVzwpx0/square?utm_term=human+fall+flat+download+android+2020+pc
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f12dea425b7b741785cd9e/1626418666743/the_complete_book_of_devils_and_demons.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec78c5b8cbe518df56d37d/1626110149709/best_split_and_merge_software.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f2556aec5ad00cc085e137/1626494314789/photos_for_keyboard.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_off0000c9f1.bin
05be589d3bc37f478dd04143091c9816d86712f43cc8c4be44bbbfccce82d0f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F1 10900 bytes
font_01_sfnt_off0000e322.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE322 16792 bytes
font_02_sfnt_off0000fb34.bin
47280e81bb93a66e50ea5ad15b367348cbf3bc9081a580825152af23984b73b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB34 15296 bytes

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