Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56987e9a52d7c09…

MALICIOUS

PDF

45.3 KB Created: 2020-06-10 05:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: b6cadaa62fe941512f5237f08572f317 SHA-1: 9b4b108c793ea234a51025f6dfc55e79ba1b0275 SHA-256: f56987e9a52d7c0928f64d8313945cee9598f321945ca931064b32366f207046
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to PDF files hosted on various domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, suggesting a malicious intent to redirect users. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://healthandcures.net/uploads/1/3/1/4/131411600/131411600.html#Euroopa+t%25C3%25B5lkestandard+en+15038 PDF link annotation
    • http://74-123-73-157.mgwnet.com/uploads/1/3/0/6/130605430/sobediboziwura.pdfIn PDF document text
    • http://horizonsmedicalcare.trevelle.com/uploads/1/3/1/6/131606670/310c57565.pdfIn PDF document text
    • http://megantwist.com/uploads/1/3/0/9/130969032/zefepazebitof.pdfIn PDF document text
    • http://baybells.com/uploads/1/3/0/3/130313567/pigovat.pdfIn PDF document text
    • http://borrowingmoments.com/uploads/1/3/1/6/131637352/furur.pdfIn PDF document text
    • http://sparrowearlylearning.com/uploads/1/3/0/5/130590339/wixawokafutusodome.pdfIn PDF document text
    • http://signaturebeautybash.com/uploads/1/3/0/7/130739222/54e001a05ba48fb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://xevubimeroz.files.wordpress.com/2020/06/zonalupisasufokalara.pdfIn PDF document text
    • https://virolerimepe.files.wordpress.com/2020/06/57784780672.pdfIn PDF document text
    • https://mixusobaso.files.wordpress.com/2020/06/78095447798.pdfIn PDF document text
    • https://wirefemujef.files.wordpress.com/2020/06/gubuxogabuvoforoma.pdfIn PDF document text
    • https://zojuvosalaj241086265.files.wordpress.com/2020/06/wavalebonaru.pdfIn PDF document text
    • https://kesakede.files.wordpress.com/2020/06/liwovoguwinugepugelexe.pdfIn PDF document text
    • https://vikefejemor.files.wordpress.com/2020/06/tesuto.pdfIn PDF document text
    • https://fozanetawivi.files.wordpress.com/2020/06/xoxikipoxuguwajab.pdfIn PDF document text
    • https://pekizov.files.wordpress.com/2020/06/68404563321.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

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE2 14672 bytes
SHA-256: 5289fd2dafcfaa59496baa195f21afb28ad2ed80010bc5dc495697d2b95a2c4d

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