Malicious PDF — malware analysis report

Static analysis result for SHA-256 a968d487b5c7effa…

MALICIOUS

PDF

68.9 KB Created: 2021-09-12 11:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9cf7fe58209b196a0b27ee37fb4724dc SHA-1: ebbf7a44afb839bbe4d891ac633f85ef71829446 SHA-256: a968d487b5c7effa64ab64afb973100cff3989ac865ef967d5bb843b87e0ee9f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript and a large number of external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded JavaScript and numerous links suggest an attempt to redirect the user to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://inwebjor.ru/uplcv?utm_term=aot+game+free+play+online PDF link annotation
    • https://a-pointpro.com/cms/ckfinder/userfiles/files/62217897303.pdfIn PDF document text
    • http://gorod-r.com/userfiles/file/pajujakolinedarobuwituzi.pdfIn PDF document text
    • https://paradigma.bg/uf/file/43511811326.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/26870243228.pdfIn PDF document text
    • http://htwy.com/upload/file/16027515529.pdfIn PDF document text
    • https://sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/kowokujonofedukupegiduw.pdfIn PDF document text
    • http://www.vandiestbrandstoffen.be/uploads/files/32893870906.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/82381251655.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2d2337155---xawilagapigijenojetu.pdfIn PDF document text
    • https://satesayap.com/contents/files/mizezarenaveb.pdfIn PDF document text
    • http://energywork.pl/userfiles/file/tebaredarusofekifepad.pdfIn PDF document text
    • https://kocarbon.vn/luutru/files/vebomuvividotujalizumami.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/80888060071.pdfIn PDF document text
    • https://spotiverify.com/ci/userfiles/files/kapikuduwusigop.pdfIn PDF document text
    • http://www.serenissimaservizi.com/files/14797496663.pdfIn PDF document text
    • https://unovosti.tv/ckfinder/userfiles/files/42010641087.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/gojesupagekasuzevixosodo.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16130436c8e228---jodezopimawemupotejak.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/gateli.pdfIn PDF document text
    • https://autohausnschmidt.de/userfiles/file/bejirufimebefuxiki.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109061609596187.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/xolabasamiji.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFBB 10628 bytes
SHA-256: f3341d3c53aa44de3eb0814bc03c2accf2010ebfa31158c7a4de46d273870de8
font_01_sfnt_off0000c807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC807 15152 bytes
SHA-256: 00e35934fcdf94986bc861179e77af198195c50659a87864d1c99bf310c4dc1f
font_02_sfnt_off0000ee26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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