Malicious PDF — malware analysis report

Static analysis result for SHA-256 e449fcdb1c130dc5…

MALICIOUS

PDF

96.7 KB Created: 2021-09-07 04:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e77981eeb0f1d0a5e1f02bde7aaf6713 SHA-1: 6be63e013a2fe945efc0e3dbf20790e8232bdf38 SHA-256: e449fcdb1c130dc54c02094ca3a90f3582e964734f9dbcd551d8b3125c2aa5f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads or disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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
  • 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.
  • 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 http://sictombbi.fr/ckfinder/userfiles/files/nudonisajorebib.pdf In PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/f02c9de174b924fe7b558d77392faf40/31069434076.pdfIn PDF document text
    • http://baobiachau.com/luutru/files/51737290857.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/putasalatebuxut.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/55666112008.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/o671feqj2ggludmt2j1g2gqkf9/50924646097.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16084e31caa100---79657201501.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/85597639780.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/f87086d5a33d98b7863dc341ffb62a6c/75386639914.pdfIn PDF document text
    • https://taucaotoccatba.vn/images/news/files/salotodasigezu.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/9625750b533a00d6336863e3dfc50760/87904986620.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd05ae0a51---mogaxif.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-8-25/20210825190052222808.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf2366a993---86585070555.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607016792d9b1---56741924650.pdfIn PDF document text
    • http://gartenbaukoeln.de/uploads/files/79071865224.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c61ea2973e4---zululudi.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/5939590089.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/psjhim996hn9pp5npo68aukj7s/36341581774.pdfIn PDF document text
    • http://naucseto.cz/storage/8161463868.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/wodoxobalowifevalarimuni.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/menurefak.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/3590ba6545bc54a81972425fe8c18f8d/49340861162.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/98005742620.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/sagifom.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/79242326534.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=fungal+treatment+pdfPDF link annotation
    • 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_off0001153a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153A 18520 bytes
SHA-256: 474a13e429fbe1285eb511ba7f80f6c81d85332a1107447e620445d36cbd3ff2
font_01_sfnt_off00014594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14594 10536 bytes
SHA-256: cfbcfc89203375717432dc2a427109cf7879465521c0549bd8d92fdd170fe121
font_02_sfnt_off00015d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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