Malicious PDF — malware analysis report

Static analysis result for SHA-256 d91c37cfc507da2f…

MALICIOUS

PDF

77.4 KB Created: 2021-07-16 16:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 421bc38ca3ec2e3cadec783e53ba7ae3 SHA-1: b40c655a87814895c1e9403c6b7b2690ca15fe03 SHA-256: d91c37cfc507da2f428d5c9c55bd879a3f60544254c0321d1edb0a46d41c99ec
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. The PDF contains embedded URLs, and while most appear benign, the presence of obfuscated content and the overall detection suggest it's designed to lure users into a malicious context. No scripts were extracted, but the PDF structure itself is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7746

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/~3/4aHNpQc2m6I/square?utm_term=cooking+sherry+substitute
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec84470d838b6c850cff15/1626113095097/ten_thousand_one_hundred_in_numbers.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60eca12fe7718717d764bd4f/1626120495166/kepokofitudezotakamaw.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7afb5fdc75e32ab05378a/1625796533343/2nd_puc_physics_important_questions_with_answers_2021.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee5b85b27e5958d5913be6/1626233734002/fitozesa.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_off0000d0f9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F9 16792 bytes
font_01_sfnt_off0000e910.bin
5983ed1ee1ba9a6e010d4f0b10653edd7aeed1cb1e273cc9b28a16d643bd9964		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE910 10656 bytes
font_02_sfnt_off0001017f.bin
bc76209b8fb29c78679bdfed933202737dbb7fd195c2eb2b1c45c96775014020		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1017F 15468 bytes

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