Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcae6be94242cc6c…

MALICIOUS

PDF

84.0 KB Created: 2021-07-15 19:16:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 651bea9a825d7835f22f871a1ecd2f0e SHA-1: fa51fe0b3c93499461e26f063d4a0c68ed5fb543 SHA-256: dcae6be94242cc6cc8987c390eaac1090a6f021ce6c44153e1d64a8171b19923
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, even if some are marked benign, suggests an attempt to redirect the user to malicious content or phishing pages. The PDF structure itself contains duplicate objects, which can sometimes be used to obfuscate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

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/~3/4aHNpQc2m6I/square?utm_term=how+long+can+cockroaches+live+without+food+and+water
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed1caf9db072196a1eb27c/1626152111430/ielts_listening_with_transcript_and_answers.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f04892edd9820e692e5830/1626359954877/wosapesum.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee2b307426fb5109f381bc/1626221360566/proverb_stories_in_tamil.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed996742b2804958663cb5/1626184039570/old_bank_flowers_and_greenery.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e83520872c4c6263c858d0/1625830688746/ecommerce_business_plan_example.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_off0000e2f5.bin
9b52404cb2a1e85b2e34a29dfb9ed1c3ba1f312a43852069b0f99309e32db0c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F5 11088 bytes
font_01_sfnt_off0000fc9d.bin
010f54cc0e58577aa6d46353f91af5b2a07166180c596e0d2e9a9fdaeeb756d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9D 18724 bytes
font_02_sfnt_off00012bbe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBE 16792 bytes

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