Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed0af2dcc25ec29b…

MALICIOUS

PDF

97.0 KB Created: 2021-09-18 01:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 14c25c42f8e1018b0069c863061edb7c SHA-1: 611fb74d3f6511902e4c3f79ef5dd9f520cf23c9 SHA-256: ed0af2dcc25ec29b56a674669d38cf8ac58590f65771d76a43ba2b8f9af28fe6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting. This suggests the document is designed to act as a link farm, potentially leading users to phishing sites or to download further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://philabc.ru/uplcv?utm_term=gta+san+andreas+mod+android+1 PDF link annotation
    • http://artwatch.ru/userfiles/file/bejanogavuk.pdfIn PDF document text
    • https://needletherapy.eu/upload/file/18329990974.pdfIn PDF document text
    • http://distant-property.ru/fck_editor_files/files/73782971899.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396b5e8b0d3---61955166669.pdfIn PDF document text
    • http://dexgerm.com/data/file/userfiles/files/58174831842.pdfIn PDF document text
    • http://hdurmuslar.com/images_upload/files/kuzokizem.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/kobutoketavapebiruli.pdfIn PDF document text
    • http://hkbroadwin.com/userfiles/loniroduwasipeweroxepuf.pdfIn PDF document text
    • http://georgewongdesign.com/gwd/upload/files/tijugusazitabutov.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161450306b3a9f---farezafu.pdfIn PDF document text
    • http://matras-devison.ru/upload/file/4889218398.pdfIn PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210906_6EB75DFF1DC0D40C.pdfIn PDF document text
    • http://nhatminhtrading.vn/app/webroot/uploads/files/dapukusijilefisob.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/12123958859.pdfIn PDF document text
    • http://eschool365.in/js/admin/uploadfiles/file/43196375459.pdfIn PDF document text
    • https://primer-spb.ru/files/files/40404242890.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/59017243766.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16140136855bcc---fugokoletejetugipojisoji.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16132d7494faeb---81107105077.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/tugexajuxejenuvaxiwava.pdfIn PDF document text
    • http://noithatnhapkhaugiasi.com/luutru/files/11923209961.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/62866436350.pdfIn PDF document text
    • http://zs.tom.ru/jsplugins/ckfinder/userfiles/files/30070766458.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_off00011674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11674 10456 bytes
SHA-256: e9b162790b48edf83cb53499339be8cb44bd317e01c79e98420d71a357ac2bcb
font_01_sfnt_off00012e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001464f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1464F 18344 bytes
SHA-256: 7d6963cb400d0c3a4e69550684397e481abe99e6eaa32acc6ccd959b4ee9ba1a

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