Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d9c78cb9934edd…

MALICIOUS

PDF

110.1 KB Created: 2021-10-05 07:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 06f1e837c283667e048bb92f7d8c7519 SHA-1: 99676d2c853229e4de755ba138750c35c3df21e4 SHA-256: d8d9c78cb9934edd614d37b3a0fade5e77cd014b6d8c255023445092266eaa8e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript and numerous external URIs, many of which point to disposable hosting or IP addresses. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript and the nature of the linked URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://oniceh.ru/uplcv?utm_term=in+which+continent+sahara+desert+is+located PDF link annotation
    • http://hanasushipickup.com/uploads/files/pupuvazopivafi.pdfIn PDF document text
    • http://millenium.moscowfashion.net/content/xuploadimages/file/68634728601.pdfIn PDF document text
    • http://xatrbio.com/userfiles/file/67464593195.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c50527aac1---kakofuja.pdfIn PDF document text
    • https://cuatudongsaigon.net/uploads/files/dajijaguvapikuruna.pdfIn PDF document text
    • https://basealimentare.it/webroot/files/fck_uploads/File/1528055870.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/67855969873.pdfIn PDF document text
    • http://burmeseburmilla-allevamento.com/userfiles/files/8531952528.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/161588ae8b22a3---raroludinisifebewofebaver.pdfIn PDF document text
    • http://hourinkan.net/js/upload/files/regat.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/felemuxexekalarabago.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/161353ff482c0e---55801564021.pdfPDF link annotation
    • https://hospvetcentral.pt/site/upload/file/37819380345.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/69334135844.pdfIn PDF document text
    • http://contrast.no/ckfinder/userfiles/files/48045446525.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/22666029872.pdfIn PDF document text
    • http://domuran.pl/files/file/levuziranesolaruwijapepus.pdfIn PDF document text
    • http://georgewongdesign.com/gwd/upload/files/11943123527.pdfIn PDF document text
    • http://elai.kz/upload/2021/09files/210904190145632162h105i.pdfIn PDF document text
    • https://rockeit.com/userfiles/file/95930133723.pdfIn PDF document text
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/wufexalebupugazus.pdfIn PDF document text
    • http://lamay.de/userfiles/file/bifukiromusegu.pdfIn PDF document text
    • https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/92697104423.pdfIn PDF document text
    • http://7sate.com/filespath/files/20210906215415.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16155ffea21564---vifokibasoful.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_off000140d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140D9 22652 bytes
SHA-256: 47c2b2b58dd0dc19ac6da2f0bb1198d8d8fb34c0c3472bf638968c2d673da82d
font_01_sfnt_off00017a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A68 10504 bytes
SHA-256: 58abd767090dbea96e9e5bc1ca872f955282f34ab65fa159a50112cc6703ab43
font_02_sfnt_off0001924e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1924E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1