Malicious PDF — malware analysis report

Static analysis result for SHA-256 86dff83e93550944…

MALICIOUS

PDF

83.5 KB Created: 2021-07-13 16:38:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 98cced6b69364fecde0a41c92b74d74c SHA-1: af5dbbefc7fdb0361774a03fb7be69ae15ac5454 SHA-256: 86dff83e93550944537b781c58f6bf24de5feb3f73cdf3514ac92b7ddbe4b24a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains embedded URLs, one of which points to a PDF file hosted on squarespace.com, suggesting a phishing or credential harvesting attempt. No scripts were extracted, but the presence of embedded URLs and the phishing detection indicate a likely attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8440

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/mHcMeCcfVl0/square?utm_term=all+i+want+is+christmas+with+you
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8dde1996685841a969c5/1626115550912/milutewinipunokuze.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7eb465eabb22f35db6065/1625811782184/classical_social_theory.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e80acb4261ba798062e8c9/1625819851455/jezekivuwuwowuxiwabolinok.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec827db8cbe518df57aa88/1626112637995/importance_of_political_science_in_our_daily_life.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed127ac2b47a61419f36fd/1626149498720/meaning_for_triumph.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e82f0869e16759cf790414/1625829128755/round_off_formula_in_excel.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_off0000e5db.bin
a7725fb7d9b8474d326f6ec1546377182821bc3349eb901148f46b96636c8572		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DB 16772 bytes
font_01_sfnt_off0001119c.bin
b5f93115ddec9143ae290180700561209905d489ac033951540964d2114e309d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1119C 10644 bytes
font_02_sfnt_off000129e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129E6 16792 bytes

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