Malicious PDF — malware analysis report

Static analysis result for SHA-256 b09135e67eac0fef…

MALICIOUS

PDF

78.5 KB Created: 2021-07-19 00:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 331e92992f83b9345f6df990d868beb7 SHA-1: db31ca921e19e7ed7cec7724b6d8585752f4eabb SHA-256: b09135e67eac0fef06a48a1f5d34be94649b4bac4bdc6aa9f9982f96eb83e851
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains embedded URLs that likely lead to malicious content or phishing sites. The presence of external URI heuristics suggests an attempt to redirect the user to a compromised or malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8621

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/eoPDrVzwpx0/square?utm_term=oxford+new+science+in+everyday+life+class+7+pdf+free+download
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee74abb1dcdf258dab06b2/1626240171792/disufefuxewi.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee23a1df274736e0a9a451/1626219425405/25919931517.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f23c561d3507074213c481/1626487894837/anation_reaction_mechanism.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f07f65faec3a5c4dac3c83/1626373989359/who_are_u_in_spanish.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f10a5b9014c44c528e8ff2/1626409563388/56007782644.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_off0000cf36.bin
cc5dd115a546aedd3bc3398f11a1646bd44a3eabe0edebb2ed22013f8f602cd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF36 17160 bytes
font_01_sfnt_off0000fbd4.bin
34847ebe252ea2b3201cab8496672b1bae2dc9128e6d51a52e406758d294f27d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD4 10960 bytes
font_02_sfnt_off00011587.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11587 16792 bytes

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