Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86a3d82698136af…

MALICIOUS

PDF

82.9 KB Created: 2021-08-11 01:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a4d08da540124261d16385b1abd4ad75 SHA-1: 589b773d8bb2a58a47f777d148aef77957b01e0a SHA-256: e86a3d82698136af0d834f5a77560f8ab1f71e3b635534206a8a3b7bca65fc04
196 Risk Score

Malware Insights

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

The sample was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests a business email compromise (BEC) pattern, aiming to trick users into changing payment details. The document contains numerous links, many pointing to compromised CMS uploads, which are likely used to host further malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/91df1a0225b9ce3dc51484028d1c2f55/16230831179.pdf In PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/55018729682.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160edbcbe0512a---44042695899.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac58472b458---vonolomomonetarenob.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/q9qp8dee5kj1fde5sun7lf26u2/fitozazejuponisuvawumakoz.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210720230001137.pdfIn PDF document text
    • http://sy-smile.com/upload/files/memugelumexito.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/93433919746.pdfIn PDF document text
    • http://esejsc.com/upload/files/95606210256.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c3a6c4a7b---dixixopufoduka.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/jubosamepaz.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/7547629775.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/451df355996f0205b784a620efd1b9e3/kofibusadiborenojife.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/2ea538b77355b05c009a12f79fc4ea44/63180529.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609431bfa8c77---wajimazitaz.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767e7b5fa0a---delerikomepuwupezobasub.pdfIn PDF document text
    • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/kidobipofutigeli.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a4fe7d199---vokugusevelipuvofobexixed.pdfIn PDF document text
    • http://stroi-sistema.ru/img/bewituz.pdfIn PDF document text
    • http://kurpinar.com/img/userfiles/files/65916765786.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/26313962858.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/natobivafovoderawigiwok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+transfer+ios+game+center+to+androidPDF 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_off0000e0d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D8 16896 bytes
SHA-256: a679ba6fc171eea2e11260af08dbe1975c11918b5f0181148c188e65c7493637
font_01_sfnt_off00010cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E1 10848 bytes
SHA-256: 55d1e3d73edb813a9eb61653a857cccbcd260ed8eb5f702c8e368e9bd3c7602b

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