Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20fa4321b494805…

MALICIOUS

PDF

98.3 KB Created: 2021-07-15 09:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e07f421c06e79be1c78131a036e8def2 SHA-1: 636d3be32ca78f7db9726f5011c72033a537d8e7 SHA-256: e20fa4321b4948054a7f3823275a6a2e3998b4d9a8995c1b6eaf9fef747d8c12
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan. It contains embedded URLs, one of which points to a Google feedproxy service. The ML classifier also indicated a high probability of maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the ClamAV detection strongly suggest a phishing or malicious content delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5879

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/nCRFBnYrBHY/square?utm_term=porky%27s+double+trouble
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edc12ee83f616bcf7f84d4/1626194222710/convert_to_odt_file.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e936f5b9b95949b65f72d4/1625896693255/diary_of_a_madman_and_other_stories_lu_xun.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60efd6f3fc6647025a3566fe/1626330867846/curse_of_the_mayans.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e914ecc22c005c93382f11/1625887980581/marrow_meaning_in_malayalam.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee47a90a53c127f5d94dbd/1626228649798/72713492775.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7864e36e647108f2a351d/1625785934427/how_to_gift_a_friend_robux.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109b5.bin
a86455e3750813a3d14d910255af54d6ccee39270b10e90ddd4edd4dfcd96374		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109B5 17228 bytes
font_01_sfnt_off0001363b.bin
e57143942bab08c0cd049742eb56e6cbb5483281ab3874cd7141b6ed62bf28b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1363B 10364 bytes
font_02_sfnt_off00014de8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14DE8 16792 bytes
font_03_sfnt_off000165f9.bin
9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x165F9 16092 bytes

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