Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea4676640553982…

MALICIOUS

PDF

75.7 KB Created: 2021-07-18 01:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 619e149eed047b50f93b4c4a682e48df SHA-1: 34c3829639b18992024abc34935233a9d8a0fa70 SHA-256: dea4676640553982396161b53238a719a8b2eb736b85075d8b5064390fcd4c58
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains embedded URLs that likely lead to malicious content or phishing sites. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classification suggest an attempt to redirect the user to a malicious resource, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/razvivatel/yapz/~3/nCRFBnYrBHY/square?utm_term=house+appraisal+lower+than+offer
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee102684a0477e84a7e9b5/1626214438694/superset_workout_at_home.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edd699895aae42f6595fef/1626199705628/pasteurization_in_microbiology.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f1a8007b51a156f05529c0/1626449920253/82715680290.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f035dc1fe2fc56fbe8324d/1626355164429/smash_brothers_ultimate_characters.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee24b48685745b7d132cea/1626219700141/madakuvafokotinegij.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8291fe047727940b9c9b/1626112658199/how_to_open_without_password_in_mobile.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec90e00e7a3c5fba3e95df/1626116320696/basic_concepts_of_strength_of_materials.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_off0000ca84.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA84 16792 bytes
font_01_sfnt_off0000e296.bin
0e2fff0b1483133473def5f104ba3d35e77f15061618b2fc908439e37f7e0e65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE296 15632 bytes
font_02_sfnt_off00010aab.bin
b407acccef9a7468aa42497b887333eda93a42b9b45e62b4f35c3e3a957a2345		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAB 10632 bytes

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