Malicious PDF — malware analysis report

Static analysis result for SHA-256 7edea82382d6626f…

MALICIOUS

PDF

76.6 KB Created: 2021-07-17 08:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 23b61dc55405d5d6b60e94ac406e5c2c SHA-1: dd13ea30edfe864fdba88a719630d312b51298cf SHA-256: 7edea82382d6626f197c229fc63701cfc2a3bd09454f0c4845d41fe5b15b8dd4
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as 'Pdf.Phishing.Trojan'. The embedded URL, while flagged as benign by the reputation service, is suspicious due to the heuristic. The PDF structure also contains duplicate object bodies, which can be used to obfuscate malicious content. No scripts were extracted, but the presence of an embedded URI suggests an attempt to redirect the user to a potentially harmful resource.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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/~3/4Ji06Fp1PxY/square?utm_term=shadow+fight+mod+apk+download
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0a7aab32fb3777072e294/1626384299093/under_the_circumstances_in_a_sentence.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee57ec4d490f672753d55b/1626232813049/muzenoxoxolumexa.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_off0000cdfb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDFB 16792 bytes
font_01_sfnt_off0000e60d.bin
fabc89d081aa7f2515eba7f3d885bcff4c4ea53e3f6010d7f98624b2d07e0738		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE60D 15784 bytes
font_02_sfnt_off00010e86.bin
bad51a3d3ac7a8aedd6ecdf4947e1b36a993a0cf469644fed5c38cfd9aca0f01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E86 10796 bytes

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