Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde880a125937f7b…

MALICIOUS

PDF

75.1 KB Created: 2020-12-23 03:27:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: af6f8c90bb7040b384d40a2acf6937f1 SHA-1: ce7aa8ce636b8c41bf16b381e4dd4c355f411505 SHA-256: bde880a125937f7b98e5410f6351004b125d2f21412419cd1fc0b598a508257b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffking.ru/123?utm_term=code+green+hospital+australia'. This, combined with a high ML classifier score and ClamAV detection, strongly indicates malicious intent. The embedded URL is likely used to lure the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffking.ru/123?utm_term=code+green+hospital+australia In PDF document text
    • https://cdn-cms.f-static.net/uploads/4475564/normal_5fa5ff89c79df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad4efa1-aaf1-41ea-a0d8-d1abac4b0c40/23671034808.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcee5fda3719f7373212445/t/5fd678075b1f6f7539da957e/1607890951734/28742501940.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf502cb3e0f577113fb13/1606284547736/97269362753.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/87822737016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a52693-7ad2-4b1b-9f6b-0c8391bc53a9/97665257231.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/jenojilagek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11fcc4ef-de2f-4e2d-8cb8-961e3704f713/smith_county_schools_tn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31c43b79-0923-4023-b848-e11ca49db79d/bradford_protein_assay_lab_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd45b0c6-5173-4e8c-864b-083b700f1877/dibufapumema.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/sccm_deployment_report.pdfIn PDF document text
    • https://s3.amazonaws.com/takeju/immuderm_skin_cream.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e18353e9-21f7-4ca9-a547-4978db976556/tapedomomajiko.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE90 2960 bytes
SHA-256: a31aedb3fe800cd2b5c0120397ec9570e12c7cc97febb81e3d6171160c50e6bc
font_01_sfnt_off0000e912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE912 5124 bytes
SHA-256: 568154f538c9238c372b9a405b82d6bdedc6ab9bbc64150caa95b3a9e83c97cf
font_02_sfnt_off0000fa70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA70 10796 bytes
SHA-256: 4d4386c72cc4104df2bea2ed8c447e37c4c39da4b9bc2c088b6826b89004448b

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