Malicious PDF — malware analysis report

Static analysis result for SHA-256 eecf194ef18bf76e…

MALICIOUS

PDF

75.2 KB Created: 2021-07-15 14:32:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9cb1e74ce9205d97d5469b1f368fdbbf SHA-1: 6e643b0c3ac66c4d3120c1eda069b6b1ee07e763 SHA-256: eecf194ef18bf76e5a7f875a466ee5e4b463a506990bbe9eed38432222a18100
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically one pointing to a Google feedproxy, suggests an attempt to redirect the user to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

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/hIkXU_AiHkM/square?utm_term=how+do+i+cut+out+an+image+in+illustrator
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60efcca2d052060b21f50677/1626328226328/34881462686.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee43be462f394a1e42b57b/1626227646319/view_my_incognito_history_android.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60efe950fd683a7867c92c51/1626335568881/sell_your_commercial_property_fast.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7babcce8457037ee101f1/1625799356793/is_age_nominal_ordinal_interval_or_ratio.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edad965860d606f483f110/1626189206720/lemevamirenizumerowamoso.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_off0000c5f1.bin
424c6d285348bff0939a90d4b1d6a2562d4fe3c7223bd3000fe596d4ab23a5b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F1 10892 bytes
font_01_sfnt_off0000dee3.bin
23155d11cb850c5419f8f455309efd1c00fe28da24991154136f6402e64d89ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE3 16140 bytes
font_02_sfnt_off000108a5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108A5 16792 bytes

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