Malicious PDF — malware analysis report

Static analysis result for SHA-256 449457e2ef801922…

MALICIOUS

PDF

76.3 KB Created: 2021-07-21 11:16:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aefa12f04055bdd21cf3acdcaf920577 SHA-1: 425d92743acb18e73101618e97093d03604f977a SHA-256: 449457e2ef8019222cbebe3d9714d0ba4043009e711af596097a8fb9a204b369
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user or download further malicious content. The PDF structure itself may contain an exploit, leading to client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/iCUEKX862tE/square?utm_term=one+piece+jinbei+joins+straw+hats
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f36445ebca9b5ae8ed88d0/1626563653589/meaning_of_mcv.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f09499e3038d33775e3332/1626379417310/fill_in_the_blanks_with_modals_with_answers.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e790911c6ee137fa0c630c/1625788561536/daxonilagil.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee67c5df3d323292d33316/1626236870055/gituli.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_off0000c5c2.bin
320221ed2c86833970f10f4e778ee314e3507ff978e05810826f0e82c1ca8573		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C2 10804 bytes
font_01_sfnt_off0000de74.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE74 16792 bytes
font_02_sfnt_off0000f686.bin
9999100087ae4e61511675d2b502bf1a9f462c966ece7aee060575d2514ab2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF686 17688 bytes

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