Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea19c1944118a1e0…

MALICIOUS

PDF

57.3 KB Created: 2020-12-08 10:48:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3b5d193d48913f9d19e45b4409c7269d SHA-1: bf23302aec885c5c361bbe4ff477bff7a22c9912 SHA-256: ea19c1944118a1e00d4f4acf4d9859a5af7858912530357ab2cdd942a53e525c
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious site, consistent with spearphishing.

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
  • 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://traffset.ru/strik?utm_term=jamaica+social+studies+atlas+2nd+edition PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401546/normal_5fb7662375d9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378410/normal_5f8e781d950a5.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/tixedujegibex/consecuencias_de_bullying.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51b05c14dfd36fe0cbc2a/t/5fc6f0db09f4d56e8f77aa67/1606873311277/rojeg.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/xfinity_las_cruces.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65358085bf90c0e222242/t/5fc84e0392e74531f3c6ac13/1606962692960/moliwuwiwin.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/indigenous_materials_in_the_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f208718-28da-4007-93bf-bd0632421541/47929785174.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/68984836804.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/20762812861.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/writing_compound_inequalities_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd3d2b8e-c843-458a-a186-f5c6c083e265/23726865308.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_off0000a7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7C1 5108 bytes
SHA-256: 4b88474f619908b1dd84258f045ef7ea2665bd568d155886eb2cd9ad7ac1cf33
font_01_sfnt_off0000b913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB913 9200 bytes
SHA-256: a9a78ad8a52d15d41026e5538940dc740b7340098c27e5057c754735c6bb87bc

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