Malicious PDF — malware analysis report

Static analysis result for SHA-256 b06a6f0d5dcb7650…

MALICIOUS

PDF

105.0 KB Created: 2021-08-12 16:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 2fd4b0781596625d8eae0afd86490ea8 SHA-1: a44b8e48413c547e63b0df5e24afc5f541207117 SHA-256: b06a6f0d5dcb7650c75a36872940522504b94c24be852516b3e39288585e7bd0
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9884

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 https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160d1bb18d301a---mulasebazaxitusefu.pdf In PDF document text
    • https://panificioilcavaliere.it/userfiles/files/59161631321.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/vonogidoraro.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/wobifobilelukulek.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/90817597189.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/37122947436.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609869006d21f---21872440126.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b780ffa4ffa---55960278570.pdfIn PDF document text
    • https://cubic.is/userfiles/file/pixik.pdfIn PDF document text
    • https://badrivishal.com/media/22962032395.pdfIn PDF document text
    • https://actorconseil.com/files/file/12927400704.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27018d2f9b---vefatezadipexisejo.pdfIn PDF document text
    • http://maxtarget.by/ckfinder/userfiles/files/81780510415.pdfIn PDF document text
    • https://havanic.com/cache/fck_files/file/xekotesetafo.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813941e89ca---rebilavegokotepezudawu.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/a0dfa0e09f2f9a2a5203c63e98426062/zebuzivemavebuxog.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/33d94253a1e357a01b858d83de14c366/vogopipoweramobiw.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0e7fe36bd---penipusikefagofe.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609fec043f3be---71528522997.pdfIn PDF document text
    • http://dichvuwebsites.com/media/ftp/file/lobepezu.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/98422537223.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1625227417piriwekurinadoxituzegir.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/99561186314.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+make+a+keylogger+in+python+for+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11858 11060 bytes
SHA-256: 34fe357648a40c1a02b49269cf3da98d02af719454ae14408a303160bbb2ecc8
font_01_sfnt_off000131a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000149b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149B6 16076 bytes
SHA-256: a671d37c7b3b889284622d243fc9727f378cc914a66da79eb58e164c6b93b0ed
font_03_sfnt_off00015ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ED4 22520 bytes
SHA-256: 14861a1f365ce6340b104cd598434e2ad793c8628237e1bfa04b8f27279699b3