Malicious PDF — malware analysis report

Static analysis result for SHA-256 89772a8665116bae…

MALICIOUS

PDF

80.6 KB Created: 2021-07-20 08:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b7a58448cb7bc973523eeb6012bc72ec SHA-1: 706f466985ded95fbd1bc6e49be81ff6710930b7 SHA-256: 89772a8665116baeb7b91e0eeb709fb8f083d4642323332b824c8a7d44029634
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs that point to external resources, suggesting an attempt to redirect the user to a potentially harmful site. The presence of PDF_URI and EMBEDDED_URL heuristics indicates the document's intent to interact with external web content, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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/CHqDoFjlE84/square?utm_term=basics+of+electrical+and+electronics+engineering+pdf+ebook
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f02573fd683a7867cc1542/1626350963278/29350839164.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7a144fdc75e32ab044858/1625792836746/oracle_reports_12c.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8c137d8d5997ba4e5930e/1625866551122/nugafevipuzedetilo.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f5027c860d895b483bfcc7/1626669692932/brook_meaning_in_tamil.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_off0000d63f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD63F 16792 bytes
font_01_sfnt_off0000ee51.bin
3c35f4b938a53158e6c320871c415bcb8f410c10b43a8d61710981600e59bdce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE51 17684 bytes
font_02_sfnt_off00011cc6.bin
0f80c3adaa5db29cf47615532dc4596fb3df769815df5348d5733ee93eab4e6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC6 11080 bytes

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