Malicious PDF — malware analysis report

Static analysis result for SHA-256 b09053b316e687f7…

MALICIOUS

PDF

76.6 KB Created: 2021-07-13 23:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4504c564f5d192261d411c20c0c34344 SHA-1: d010fd8f6f7274885696322fb9668b7fcfb75c21 SHA-256: b09053b316e687f778a939a764cdb7bfeb8cdd2a121314678e6f24973f0c788f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs and the PDF structure suggest it is designed to trick users into visiting external sites, potentially for phishing or to download further malware. Although the document body is heavily obfuscated, the overall pattern points to a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8972

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/pL_UGxDroB4/square?utm_term=medicare+part+b+reference+manual
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8ecd8e6a58043b68f08ff/1625877720709/48746535593.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eddbcda0f2ca3483d1b2f2/1626201037445/rezuzorafemiw.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed9cf1dfc7900eec3243b8/1626184945971/zatimelome.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ecb30ab067801019595862/1626125066954/15848345079.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7945e4b964f05b843f727/1625789534705/zujeniz.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ecb8bd786e7e037ecc4f87/1626126526072/soil_acidity_and_plant_growth.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_off0000cada.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCADA 16792 bytes
font_01_sfnt_off0000e2ec.bin
2d81cdb866d08ca36f6f0efe36133204603a83a2846b3621d8ecd8ce1f20a18c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EC 16652 bytes
font_02_sfnt_off00010e45.bin
7924ddb1efcd8d042dd52d4bb75c400ef79aa345712b0207f6b7872ce446012d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E45 10724 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.