Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0ef4a6ac1a6c4e…

MALICIOUS

PDF

82.4 KB Created: 2021-07-19 14:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b3de95be24944ce009b0a559c43997b1 SHA-1: 393c5667282cf84b0a0b4c7a509d53705165dff7 SHA-256: eb0ef4a6ac1a6c4e5f524bfde1568d6cbe3874e847d34fbd92f39fe4e3c15253
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, although many are marked as benign, suggests a potential phishing or redirection attempt. The file's structure and detection patterns align with common techniques used to deliver malicious content via PDF attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8666

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/~3/7R6buoffwiA/square?utm_term=blockhouse+coffee+and+kitchen
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e9387a19a9f87deb73957c/1625897082384/bearing_and_distance_in_mathematics.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8010f23621b4743e56836/1625817359623/munidan.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7e070ed7e630439644ff9/1625809008722/urdu_meaning_of_courage.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8feadfc46b1505826bad7/1625882285315/subfield_of_cognitive_psychology.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e914a5b9b95949b65e3db8/1625887909346/my_father_is_strange_episode_52.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8610744497c3ffe66eaff/1625841928299/suzis.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee8879f6c772366d321459/1626245241612/nitunagegawikipikezijade.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_off0000de92.bin
0892a4caeee92b53a4a8f4d41a32ead7238fc4af2f79bea096d654b60f1ff261		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE92 10716 bytes
font_01_sfnt_off0000f72d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF72D 16792 bytes
font_02_sfnt_off00010f3f.bin
a037a74af7daf9aad6f417ec0822f1ad32a5278fa1fb450a325da12ad054934a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3F 17312 bytes

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