Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c97e60bce84a5f…

MALICIOUS

PDF

97.0 KB Created: 2021-07-19 02:36:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 67e37ac9b87a23aaaf2b8fe59587653d SHA-1: 0b763703bf1456e7bd8d2814adc2f77ea6dcecc0 SHA-256: 71c97e60bce84a5f83a08c2357be41d7cb6e9322ec27503880f9c0b0eedeb0a9
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as 'Pdf.Phishing.Trojan', indicating a phishing attempt. The PDF contains embedded URLs that likely serve as lures to external sites. Although no scripts were explicitly extracted, the nature of the detection and the presence of URLs suggest the document is designed to trick users into visiting malicious content, potentially leading to credential theft or further malware infection.

Machine Learning

  • Nyx PDF Classifier clean score 0.1777

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/AnJPYMJXbyQ/square?utm_term=which+of+these+questions+can+be+answered+with+a+simple+yes+or+no
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edac02262c1d401135ff07/1626188802662/bioprocess_engineering_2nd_edition.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f20b99522e673eeafe5885/1626475417487/xogowapumuwidufaf.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edfcdce6792c2552be49d1/1626209500353/jisipiwizipamo.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4e9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E9 16792 bytes
font_01_sfnt_off00010cfa.bin
1cf5ed78cfd0d3bcabe8b386f5c87ef6c5f47f04144d609ffb6518c1ab8d0a46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFA 16288 bytes
font_02_sfnt_off00012319.bin
2ba8075c184396b8cfd1b86c5e7ac0961778beda9129a9936f1e8eefd15ad52f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12319 2536 bytes
font_03_sfnt_off00012de8.bin
9a9cb9c03b515450c6188be9c1d1b33cd5e3107d99f1f9f6f0b1d0212726757a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE8 17652 bytes
font_04_sfnt_off00015bc4.bin
360f66d5d1a25e37ee108c96dc253758becf658e9f25454260e7b67e2f737ada		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15BC4 11464 bytes

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