Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa641a6b2661854…

MALICIOUS

PDF

42.2 KB Created: 2020-05-25 00:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: cebfeaaf5ade68527d4abb67519db11c SHA-1: 281a506b92e8317976291484f27620c414c8e9a8 SHA-256: baa641a6b266185408e7f6a365e67993305efd7343c737cfa571362301999440
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified as a link farm, suggesting a tactic to manipulate search engine results or redirect users to malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous URLs supports a campaign likely involving SEO manipulation or content distribution. No scripts were extracted, but the PDF structure and embedded URLs are sufficient indicators of malicious intent.

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://mingshengyulechengxianjinbaijiale.br3h.com/uploads/1/3/0/2/130289741/130289741.html#aviculture+au+cameroun+pdf PDF link annotation
    • http://sparkdesigns.studio/uploads/1/3/1/3/131384015/ligotokunukepi.pdfIn PDF document text
    • http://techresourceilm.net/uploads/1/3/0/7/130738710/106dc2727de4.pdfIn PDF document text
    • http://215mainstreet.com/uploads/1/3/0/6/130620887/nebevizu.pdfIn PDF document text
    • http://acmereclaim.com/uploads/1/3/1/0/131070490/tonilexadagusor.pdfIn PDF document text
    • http://s4like.net/uploads/1/3/1/6/131607117/fofovu.pdfIn PDF document text
    • http://stopbeingscammedonline.com/uploads/1/3/0/3/130323723/6287667.pdfIn PDF document text
    • http://tospublishing.com/uploads/1/3/0/6/130604288/votofu_newuminoxuvap_rejiwi_vupipusifa.pdfIn PDF document text
    • http://osullivanmanufacturing.com/uploads/1/3/1/6/131636935/d4c9f8b735d0e.pdfIn PDF document text
    • http://innovationinthemiddle.com/uploads/1/3/0/7/130776212/8413201.pdfIn PDF document text
    • http://fountainalleybodycare.com/uploads/1/3/1/6/131637024/vebokerigorupi-rebubamesose-gizafupavom.pdfIn PDF document text
    • http://erpcustomdesigns.com/uploads/1/3/1/8/131871695/8716018.pdfIn PDF document text
    • http://treasurecoastprimeproperties.com/uploads/1/3/0/8/130874497/daxikupalulozeronuri.pdfIn PDF document text
    • http://my-kenz.com/uploads/1/3/0/3/130323511/d82bba4e4c9.pdfIn PDF document text
    • http://ajarchinger.com/uploads/1/3/1/8/131871740/4ece454.pdfIn PDF document text
    • http://ozeducation.org/uploads/1/3/0/3/130324063/bazopumatipivem.pdfIn PDF document text
    • http://heartandhomebeartraditions.com/uploads/1/3/1/3/131383720/rikifakotusobuwuz.pdfIn PDF document text
    • http://nomercygiven.net/uploads/1/3/1/6/131636978/gopupalezelebem_pugubijitu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

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_off0000763b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x763B 12508 bytes
SHA-256: 5eb88fd1f29594c71a6ffce7a3479cd106f986c9f855838c8ea13a04782e7e03

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