Malicious PDF — malware analysis report

Static analysis result for SHA-256 96243232f7b2529b…

MALICIOUS

PDF

72.0 KB Created: 2021-07-19 01:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee7180ee94133ff13f2d61244e181ad6 SHA-1: 7dc32d584534bb0a24aae3241503e80278368c41 SHA-256: 96243232f7b2529ba821fd1c1656877ba670cbc555fe8bcd59aae526c107c2ff
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8363

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/jEScUJLm1bs/square?utm_term=muffled+meaning+in+tamil
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f23a79d9389f5e8082901d/1626487417945/why_is_my_autofill_not_working_on_iphone.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ed37e136a7a57c1cf0ac14/1626159074053/dasezinuxub.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e89d6cde37743ed515bd94/1625857388833/oil_futures_today.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee73e97dee9f188f7b9b43/1626239977494/94991711917.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f46d1829712869f07276b0/1626631448554/kejatoketafodabakuzugivi.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e912afb9b95949b65e29de/1625887407521/and_in_another_life_i_would_be_your_girl.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_off0000bb60.bin
682e24eeb90fbe1076a3de3042ec16845af08ddbf7bbe4c7c95a773e5a4cd141		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB60 15924 bytes
font_01_sfnt_off0000e4a5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A5 16792 bytes
font_02_sfnt_off0000fcbc.bin
3d34f9af9c03d72fe45bd03332b3627b62c5d0e6eda479370e56b5b699b4f50e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBC 10404 bytes

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