Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e386b5ebca392d…

MALICIOUS

PDF

83.2 KB Created: 2021-09-02 08:35:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b4c5b13416eda1f15f9d17e75d1f11ae SHA-1: 3cec8f727de0adbea9bd0d6c986726fbd0d6ef56 SHA-256: d7e386b5ebca392dbf87889658d614bf66cee5248ad493b042888e56c9a66960
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF containing a link farm, with multiple URLs pointing to compromised WordPress sites and other domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cca42fca2---92719256433.pdf In PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/a223c1b6a6ac14f7bb39b573d973b98d/dorijid.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e98b7af09d---3778066647.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bc6318d89---tiwutajozosebajufevofamu.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/33563164896.pdfIn PDF document text
    • http://huarui-bio.com/upload/files/77419883208.pdfIn PDF document text
    • http://xnucleus.com/members//member_images/files/97668722836.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/cee0b74877b3e089a6baefd8044b07d4/zunotolepomovezuwig.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161233c8a0fab3---gisanogotajazinejaxi.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081c98ff1a83---veramewutef.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/hrq6rcm3fuh5a9e0m77ctnuo30/komibefutejajitodofomir.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1de117ed1---16882719578.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0190e163cd---13439847775.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160aa08a6be083---jewesilewobexosomaba.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/50832376624.pdfIn PDF document text
    • http://turbotechnik24.de/userfiles/file/48034782648.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/ed093f0c294d2e00226ca4d5cd02425e/80149363738.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/2c521ca5c855aa788f0e05419a7f2c17/90758637665.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160da1fba5b3b3---90748329443.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/7938d5be04e63049fb35c1ebf4a87bef/vonetuni.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a03e5f86ca7---wonozuzokezosipufu.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/xapapisepat.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/97795822136.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/atunuvajilisiwofizud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=investment+banking+case+study+with+solution+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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E7 17468 bytes
SHA-256: f2c3b0c22352878e392101efb369735ea6a05e58d4b32c442ec24f6d8b51244a
font_01_sfnt_off00010e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E23 11516 bytes
SHA-256: bb999c917f2d87fdc7570fd97da921b14f4df3688d0267faf30bc19e8fded0e5
font_02_sfnt_off000128e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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