Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3489a1ee05f7f99…

MALICIOUS

PDF

92.4 KB Created: 2021-07-17 01:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8311e897e67cec10a3e77810abcc7d05 SHA-1: cad431ae7ea3ff837f8c1aeb25098c658c83452e SHA-256: e3489a1ee05f7f9967c36b646392edaddd149b8a3448d050e59180c74fb08f36
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating phishing and trojan activity. The PDF contains embedded URIs that point to external resources, suggesting an attempt to redirect the user to a potentially malicious site. Although no scripts were explicitly extracted, the presence of embedded URIs and the ClamAV detection strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier clean score 0.1718

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/y83TWYo-3DA/square?utm_term=meaning+of+muddled+in+english
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f1a6fe77c7cc658ba7b258/1626449663458/we_want_to_build_a_snowman.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecb7e174517d3de21816e6/1626126305142/how_to_open_password_lock_file.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e940eddb8bb141bada5eb1/1625899246072/levubof.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e78bfd46a8e17713e0253e/1625787389157/tugexewafovis.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000143f3.bin
139099fb2002351c44a1dafa5c9d8332bb3dfb13a65be0c51f00999ec2c42bac		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x143F3 19016 bytes
font_00_sfnt_off0000c879.bin
28d0b734dc7dca1040dd7b8c1280c80a8bb2267d23c0360a5ca9c029646d1a89		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC879 24060 bytes
font_01_sfnt_off00010231.bin
00793cc6b53ebf8fd50c29f1ef27d0d36efe24f265ca520767daae711cf5e952		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10231 4808 bytes
font_02_sfnt_off000113cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113CB 16792 bytes
font_03_sfnt_off00012be2.bin
58b3dbdbced36eaf7750a201d8db0c78436ed125c3eac0d91d65388076f01c8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE2 10696 bytes

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