Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a5ea69e4fcaf32…

MALICIOUS

PDF

62.6 KB Created: 2020-06-12 19:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 54ed46a006e74165aaef488cbbdb55ec SHA-1: c5aa173b90abbb517e8cb6b709501be98e25d0f7 SHA-256: 09a5ea69e4fcaf329e003e03f1f3fcb9693ecf148d2bd6601304af9993c9b580
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by an ML classifier as malicious and contains a large number of external links, many of which point to other PDF files. The primary function appears to be acting as a link farm, potentially for SEO manipulation or to distribute further malicious content. No scripts were extracted, but the sheer volume of outbound links suggests a malicious intent to redirect the user to potentially harmful resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 http://mx.nadiasalomon.com/uploads/1/3/0/2/130289278/130289278.html#5e+modeli+matematik+ders+plan%25C4%25B1+%25C3%25B6rne%25C4%259F PDF link annotation
    • http://smtp1.lessoeurcieres.com/uploads/1/3/1/3/131383823/7818322.pdfIn PDF document text
    • http://accelerationdays.com/uploads/1/3/1/4/131452733/fizosamajuwulijozupo.pdfIn PDF document text
    • http://globalbridgelinkservices.com/uploads/1/3/0/3/130313539/8245973.pdfIn PDF document text
    • http://c60madeinusa.com/uploads/1/3/0/5/130590105/886b596a43194.pdfIn PDF document text
    • http://maddislascecooks.com/uploads/1/3/1/8/131856134/cdcef83277.pdfIn PDF document text
    • http://adlithium.asia/uploads/1/3/0/6/130621801/kixodapupo.pdfIn PDF document text
    • http://poddiction.com/uploads/1/3/1/6/131637209/bbdf03066a205d4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://mevowavam.files.wordpress.com/2020/06/43051925933.pdfIn PDF document text
    • https://buwivimew.files.wordpress.com/2020/06/sikevowafiperupomizinuri.pdfIn PDF document text
    • https://larusepami.files.wordpress.com/2020/06/jewodasazuxub.pdfIn PDF document text
    • https://sagunukepeg.files.wordpress.com/2020/06/sutazobo.pdfIn PDF document text
    • https://jidiluda.files.wordpress.com/2020/06/lumutejezamuzokanom.pdfIn PDF document text
    • https://tivujoz.files.wordpress.com/2020/06/34887734991.pdfIn PDF document text
    • https://lazatojifu.files.wordpress.com/2020/06/zoxamaxirivamifovun.pdfIn PDF document text
    • https://gutagaperub.files.wordpress.com/2020/06/davowesavapijononamega.pdfIn PDF document text
    • https://kitafolek.files.wordpress.com/2020/06/ramorutuxoxituxegifoweb.pdfIn PDF document text
    • https://toruxot.files.wordpress.com/2020/06/ruxufinosidadasov.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC07 13788 bytes
SHA-256: 3e762ecc29297e79063720ad2ff62a9fb8a99f47b4b1723b2862457979b2bf5e
font_01_sfnt_off0000d6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A9 16140 bytes
SHA-256: 4fe94d0d01e3fc85851e78d971ea394167cca9f5539491c06b64ba9eee8df098

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