Malicious PDF — malware analysis report

Static analysis result for SHA-256 47352426e55bde11…

MALICIOUS

PDF

80.6 KB Created: 2021-02-22 12:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 826330b5ad0e0d60caca12b16e2a48ef SHA-1: d4275b62d1e68761ddc092af77c7ae571f896d71 SHA-256: 47352426e55bde115b452339b71b6cfc3cc3444d5e0d188b660bff8a76ad1246
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://crophysi.ru/strik?utm_term=dante%2527s+inferno+canto+1-10'. The ML classifier also flagged this PDF with a high probability of being malicious. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Dante's inferno canto 1-10', suggesting a phishing or social engineering attempt to drive users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/strik?utm_term=dante%2527s+inferno+canto+1-10 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4467298/normal_602c0156f37e2.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/NYvhcfA/walmart_jelly_filled_donut_calories.pdfIn PDF document text
    • https://cdn.sqhk.co/jodariwem/i4hcZje/shuddered_definition_in_spanish.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489441/normal_600d78c007613.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369330/normal_5fe0a67804d79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446382/normal_600d18fa52b21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481270/normal_5fee466763c1a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487432/normal_5ffbc28c7fc4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489052/normal_5fd805e7a1077.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/bTFjjdK/2941408443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451377/normal_5fda56e40ef52.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/gcW1ijp/saxasejijakaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449766/normal_5fe2a7a3ecc02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dofufiri/69223537256.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/zututobapukavumizexugi.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/has_anyone_ever_died_at_disneyland_paris.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/zorodisevikiwanebuvufon.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/metodos_anticonceptivos_ginecologia.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/vunarugubevamatonirituwup.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/19366497110.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/bonafide_application_format_for_school_student.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/falcon_zero_f170_64gb.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF37 5100 bytes
SHA-256: 9e16e7b706189fd963bcb1a268762bf533a325a35ba36080e981f53e0177ead4
font_01_sfnt_off000110b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B7 10604 bytes
SHA-256: 5c613cf9e90fe29d72fb6c89f82dae00763afd16bc8e4c56669960d8b9a60042

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