Malicious PDF — malware analysis report

Static analysis result for SHA-256 237ea69247971f25…

MALICIOUS

PDF

71.9 KB Created: 2021-02-27 10:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9c88549f7872b4b522f75668fe78a1f5 SHA-1: c9988af6ee935fe43c9fc02f6cdb5fd86a39bdb4 SHA-256: 237ea69247971f254136d53baa1326628462028bdc561e515ae478094f54468c
66 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a lure to external malicious content. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the presence of embedded URIs and the link farm heuristic point towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/wix?keyword=homelife+led+bars PDF link annotation
    • https://wunogalabapa.weebly.com/uploads/1/3/4/6/134603674/6837418.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469849/normal_60098973e016a.pdfIn PDF document text
    • http://doxisolawasusig.66ghz.com/47150205252.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/the_lion_the_witch_and_the_wardrobe_series_movies.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416921/normal_5fdf97d077701.pdfIn PDF document text
    • https://dakurawal.weebly.com/uploads/1/3/5/3/135321076/770f74413b9.pdfIn PDF document text
    • https://dolujutizividev.weebly.com/uploads/1/3/4/8/134864897/sanodofuxa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492900/normal_6007f33d8cd37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470696/normal_601224681d7f7.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/tilemexuxevun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jefebewo.epizy.com/adelitas_way_discografia.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/beraxafokadobapi.pdfIn PDF document text
    • http://bewojux.epizy.com/test_de_raven_general.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF15 4756 bytes
SHA-256: 5b93b22199f2bd9818e5b8b6c76efb50820edb86d5111e2ff886da2dd730408b
font_01_sfnt_off0000df2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2D 11044 bytes
SHA-256: 4e11faa375b8b8f8744ea60d29ef0325971b79d9410cb27519ef74f722a3738f
font_02_sfnt_off000104e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E2 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.