Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf6ed57b92731d6…

MALICIOUS

PDF

84.1 KB Created: 2021-07-15 20:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee2ae2575996f3fac86f03409ccd8acc SHA-1: 03a03c8735c50d596e36b5e027dabc4799857cfd SHA-256: 1cf6ed57b92731d6236a9216879ab6e41fdafd2f9579d40f56c0cf8ff67d49d1
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. The PDF document contains embedded URLs, one of which is associated with a phishing heuristic. While the document body is heavily obfuscated and unreadable, the presence of these indicators suggests a phishing attempt, likely using the embedded URLs to redirect the user to a malicious site. No scripts were extracted, limiting further analysis of the execution chain.

Machine Learning

  • Nyx PDF Classifier clean score 0.1630

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/eaN1Eb74jJI/square?utm_term=the+scientific+classification+of+organisms
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee06943be50f2c5db1f4d8/1626211988149/freddie_highmore_director_the_good_doctor.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_off0000e77b.bin
614ff9dced57271d45919260ced77f68b3a7bebe76d4532fd75aa646c7c962c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE77B 17052 bytes
font_01_sfnt_off00011432.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11432 16792 bytes
font_02_sfnt_off00012c49.bin
97091940aa910da627fb2093197f7d1990085e00314def25c8d333084275eb0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C49 10744 bytes

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