Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf6d4705e04632a…

MALICIOUS

PDF

75.9 KB Created: 2021-02-28 01:34:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: ed3b340c36e7a8928f7342f9c89ee8fd SHA-1: 20391b41dac9fc55b2ed07ca03a5744998db10fa SHA-256: 8cf6d4705e04632a8f018dbd7b5d5698292c7e9ffbffd4d8e3908616e21d1a36
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many hosted on disposable domains or link farms, suggests a phishing or malware distribution scheme. The primary malicious URL identified is https://mezovuduw.ru/award?keyword=titulo+de+credito+%25C3%25A9+bem+movel+ou+imovel, which is likely used to deliver a second-stage payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://mezovuduw.ru/award?keyword=titulo+de+credito+%25C3%25A9+bem+movel+ou+imovel PDF link annotation
    • https://xuzubakew.weebly.com/uploads/1/3/0/9/130969304/8572999.pdfIn PDF document text
    • https://gowobokibisalo.weebly.com/uploads/1/3/0/9/130969305/tijunifuzo.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/87223224156.pdfIn PDF document text
    • http://abreudesigns.com/86341966144zyq8u.pdfIn PDF document text
    • https://sibomimotilelib.weebly.com/uploads/1/3/4/2/134235458/2211145.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422894/normal_5ff0b5b52c07f.pdfIn PDF document text
    • http://help-igcopyright.xyz/56246992951ju6qd.pdfIn PDF document text
    • https://kigazodiraju.weebly.com/uploads/1/3/4/6/134678535/5cd11b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464521/normal_60371044909b8.pdfIn PDF document text
    • http://blockingscenery.com/how_to_oil_heaters_work5c0ot.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/6zjaufd/tofona.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422163/normal_601ca970ef598.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vigavanoxe.onlinewebshop.net/disneyland_paris_guide_map_2019.pdfIn PDF document text
    • http://pusapovewazigu.onlinewebshop.net/69325881910.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/simplicity_lawn_tractor_attachments_for_sale.pdfIn PDF document text
    • http://feferabi.atwebpages.com/how_to_write_an_analysis_paragraph.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/animal_world_map_vector.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/41605477059.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_off0000e9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EE 4988 bytes
SHA-256: 01111b1222f36a3e113c66cf86ba4fa59a04c06202e9cce847b53849dab5d67b
font_01_sfnt_off0000fa8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8D 12496 bytes
SHA-256: 020ee18eaa87b38b2b4965f8a91c1309b57bf2f78c8d0d8348ce7c4b4e587f94

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