Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d3815dc2e6ccdbc…

MALICIOUS

PDF

75.2 KB Created: 2021-05-04 04:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a7e3cb98d6ee92e8afb92e404ac3f37e SHA-1: 2db18f597a6a7adad3bad11fecde0b890326c317 SHA-256: 1d3815dc2e6ccdbc0a9d75ba1b42ced360561b80a684bed03cd8e53e94f8cceb
126 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to disposable hosting and employing UTM parameters, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=harry+potter+ebook+price PDF link annotation
    • https://kelesidudukakub.weebly.com/uploads/1/3/5/3/135340861/7636063.pdfIn PDF document text
    • http://luwinilulurop.mywebcommunity.org/zigisunene.pdfIn PDF document text
    • https://niwanuve.weebly.com/uploads/1/3/1/4/131406473/74d6e333.pdfIn PDF document text
    • https://vuwezamubom.weebly.com/uploads/1/3/0/8/130814902/nulusedezesak.pdfIn PDF document text
    • http://gusevoxuzuwelap.mywebcommunity.org/92640352626.pdfIn PDF document text
    • http://negeduji.66ghz.com/vibisufesuvixixezamo.pdfIn PDF document text
    • http://tegor.xyz/84307991310zdmtz.pdfIn PDF document text
    • http://dalkomis.website/47720799052tz3wa.pdfIn PDF document text
    • http://scandisvet.ru/jefaj9sne5.pdfIn PDF document text
    • http://load-bcp.com/31105030435z6we5.pdfIn PDF document text
    • http://fenemixov.iblogger.org/how_to_start_a_simplicity_riding_mower.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad0ad0d-9ece-41fb-ac16-35dddcb82399/girexafepumo.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/combine_excel_sheets_into_one_tab.pdfIn PDF document text
    • http://vetiluxakosimut.epizy.com/bupomuwumuwoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11e2ad9c-41a5-41f9-9339-ac10d0344a73/rayalaseema_love_story_telugu_movie_trailer.pdfIn PDF document text
    • http://zenakezogutomu.onlinewebshop.net/foxpro_wildfire_troubleshooting.pdfIn PDF document text
    • http://varowok.epizy.com/sahifa_alawiya_urdu.pdfIn PDF document text
    • http://jatujij.rf.gd/contexto_social_de_la_profesion_libro.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/rental_agreement_in_spanish_template.pdfIn PDF document text
    • http://zuzopejorexa.onlinewebshop.net/d_d_descent_into_avernus_trove.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0F 4984 bytes
SHA-256: 53ea89afed996d3f3a0edd07b23fcabcc81d9dfe5a7a3520a61fe695ceadbfe3
font_01_sfnt_off0000fb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB16 10880 bytes
SHA-256: 676cde10a1f1cccfd6472c61c292ee9ae4778048003952a7bad09f0e5b5e59d6

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