Malicious PDF — malware analysis report

Static analysis result for SHA-256 92fa081b7218d3d3…

MALICIOUS

PDF

73.6 KB Created: 2021-07-13 15:00:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aeb1d69722ff3349c0034de200eaa07b SHA-1: 4ecb7eaca06ca270b9e376ae32d6736a9283bc17 SHA-256: 92fa081b7218d3d3af7c0cc840268cb1019b85d71233a82b7a026112d8b7a5f3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs that are likely part of a phishing campaign, aiming to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8907

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/iXsW93xxTQA/square?utm_term=meaning+of+menses+in+english
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed49610318596fdcc1b815/1626163553109/mba_dual_specialization_in_finance_and_marketing.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ecfdf19db072196a1cdb71/1626144242203/61124088903.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec9b5983836e7a7d62df02/1626119001527/sepigowubadejixe.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e965682f3c4128e18c5b1d/1625908585085/14664446429.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec83347726b430b468326d/1626112820292/virenawatunome.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed516ec2ef2d11c8d4f004/1626165614484/largest_species_of_horse.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_off0000bcd1.bin
7feb75fcecc4f36d27eba71bf1f97ab5d4826c46210a0340283969bf7156ff4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD1 17884 bytes
font_01_sfnt_off0000eae6.bin
4d97fde3361217fbecff7a087b5b24aba2684500cd8de7f79f527f36011c1d60		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE6 10456 bytes
font_02_sfnt_off00010268.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10268 16792 bytes

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