Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b034d857e438f1c…

MALICIOUS

PDF

99.3 KB Created: 2021-07-17 00:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b1d8704549ee63615c9f37e1a68f9569 SHA-1: 201f5b97e5021f1cf571796274712da9784ac6b2 SHA-256: 5b034d857e438f1ca2783cf7fa1bfd4e468540ecf924f4b721cbff4e771ff75c
66 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. The presence of embedded URLs and the PDF_URI heuristic indicate an attempt to redirect the user to external content. The duplicate object body heuristic suggests a potential vulnerability exploitation within the PDF structure. While no scripts were extracted, the overall pattern points to a malicious PDF designed to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3079

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/razvivatel/yapz/~3/gPkW7oTCsL0/square?utm_term=general+inquiry+meaning
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee62500b33b63bb8c84cc1/1626235473022/37687029340.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0dd1bc699444e2e3dd3b1/1626397979460/template_for_ielts_writing_task_2.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f1f5b070fae72f93207d91/1626469808981/how_to_mix_black_paint.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f11355e75c7a046d9bbfd4/1626411861172/french_connection_cocktail_recipe.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca63.bin
88d3639df1bb19e58bdfff5003d3bcf57d0f0f2cce95781b8a9f0689bb2bb305		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA63 34172 bytes
font_01_sfnt_off0001273c.bin
b5206b7bdad3a86738a0c4a1df6add77f291688b2aa2767842d1b67d01eb4605		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1273C 16436 bytes
font_02_sfnt_off000151e2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x151E2 16792 bytes
font_03_sfnt_off000169f9.bin
32c8bc5c0afe48e8f1cc9f4205234d343369fd807b4514fcdd9c14f9b7604ed2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x169F9 10464 bytes

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