Malicious PDF — malware analysis report

Static analysis result for SHA-256 99f47c7e29ad0a8a…

MALICIOUS

PDF

79.1 KB Created: 2021-07-18 12:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7db6cb005f2a4dc7f19be0c5b549c1c1 SHA-1: cf9524363eafd74f607be8fac1fa836766428ce4 SHA-256: 99f47c7e29ad0a8a486c5b59b99146d392f0736151cb77476e370fe6f21550ca
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 high likelihood of malicious intent. The PDF contains embedded URLs, suggesting it may be used for phishing or to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded content are indicative of an attempt to exploit vulnerabilities or trick the user into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8896

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/y83TWYo-3DA/square?utm_term=acronym+for+beautiful
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0d4ab06e5cb5c826048e8/1626395820009/download_3gp_movies_for_mobile_phones.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f35b3cdb752c5e49ac5aab/1626561340093/types_of_sparger.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e856f5c7527c785cd38efe/1625839349455/collagen_structure_and_function.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f020985740a719f4adb690/1626349720785/tujakumonamugibegef.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8df1b18245d33f17e3326/1625874203422/55611033043.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f3de90c4d0d61e673e0105/1626594960451/13547054742.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1b8945ff4666bfcbd0d8b/1626454164715/95949729557.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_off0000d7cd.bin
46f28456bb49da64a4726291c6c3db36eb710b1d4a46ce33658f25f597769cd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CD 10664 bytes
font_01_sfnt_off0000f03b.bin
3af4a8a79bae4db01a6e6922139d8616a06d4f2f27059e23d39b5cba0563db69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF03B 15744 bytes
font_02_sfnt_off00011876.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11876 16792 bytes

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