Malicious PDF — malware analysis report

Static analysis result for SHA-256 865ea7ae897e13ed…

MALICIOUS

PDF

38.4 KB Created: 2020-04-23 20:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: 0e92464dffbb17eee3e424838fb32211 SHA-1: dfbb0b13415f383bc75a8d3bb7414179d182b81b SHA-256: 865ea7ae897e13ed2159fc261a16606747f7c0dcd12dd439b112b512deefc80b
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or distribution network. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the sheer volume of external links and the PDF structure suggest an attempt to redirect users to potentially malicious content or for SEO manipulation.

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://votelynnefugate.com/uploads/1/3/1/8/131858108/131858108.html#centrale+sans+rounded+bold+font+free PDF link annotation
    • http://hydruscontrol.com/uploads/1/3/1/3/131381819/710b9287ca.pdfIn PDF document text
    • http://noahcaseycounselling.com/uploads/1/3/0/7/130776535/leleposa.pdfIn PDF document text
    • http://wwwdaimondholiday.com/uploads/1/3/0/6/130605292/liworilawovogotigim.pdfIn PDF document text
    • http://shopmarae.com/uploads/1/3/0/2/130272241/3996147.pdfIn PDF document text
    • http://goldstandarddrivertraining.com/uploads/1/3/0/2/130287943/rofosefafe_vurijexewegotom.pdfIn PDF document text
    • http://gen3realty.com/uploads/1/3/0/8/130874292/8830398.pdfIn PDF document text
    • http://t2designandconstruction.com/uploads/1/3/0/6/130604140/rexubuj_tijenebonuwivu.pdfIn PDF document text
    • http://justleafwell.com/uploads/1/3/0/6/130620880/tenot.pdfIn PDF document text
    • http://affinityinnerbalance.com/uploads/1/3/0/6/130620959/3758954.pdfIn PDF document text
    • http://stevegoldforassembly.com/uploads/1/3/1/3/131398281/nipepa_nigusobofoxepe_tilewoxiboban.pdfIn PDF document text
    • http://naturewildlifephotography.com/uploads/1/3/0/6/130604230/timukif-xubabaju-juzegemukigavik.pdfIn PDF document text
    • http://prevencioncreativa.com/uploads/1/3/1/4/131437453/rexev.pdfIn PDF document text
    • http://drleepsychic.com/uploads/1/3/0/6/130621383/9948048.pdfIn PDF document text
    • http://cambridgeasparagus.org/uploads/1/3/1/6/131606408/palonogapavif.pdfIn PDF document text
    • http://blazingfastfitness.com/uploads/1/3/0/6/130604672/04bd4aa3ace.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 6

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_off00005ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC9 7408 bytes
SHA-256: 490e3c1ed1d8e094e3913578e82926bc7b448d24cb3bd604956e9bc313a2036b
font_01_sfnt_off000077da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DA 16084 bytes
SHA-256: d65752e558a9090157c9a1b02647c04d2680198cf9d52ff42939ef8ccbf7fabd

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