Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ba6ffc7f4f722f…

MALICIOUS

PDF

79.9 KB Created: 2021-09-06 13:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b6f54265692ce9a73f43134b71f3df04 SHA-1: 773a0d67fcaaa365915c09574e994a924644aba4 SHA-256: d1ba6ffc7f4f722f14b586789299913ddbf60367cfee5fcfcab4c4e4c9fe43a6
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing sites. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://virus-safe-zone.com/ckupload/files/35429796530.pdf In PDF document text
    • http://www.vikingmaterials.com/img/68583829594.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/k34d664d3upk616mlr5vi1di5i/voriximepaguxadab.pdfIn PDF document text
    • http://siamintertrade.com/file_media/file_image/file/dilotuxamin.pdfIn PDF document text
    • https://www.ksmt.edu.np/assets/ckfinder/userfiles/files/16700568988.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/6uchrf67psu6vlbugrv7tjoquh/11377272248.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/2imhmq4phttjggmc3tjgevn1be/23295590775.pdfIn PDF document text
    • http://wingmanplanningdemo.com/userfiles/files/52449113427.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/82405811106.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/q0jc9ttim70p50der0462pdf24/94688493121.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/pufijowoz.pdfIn PDF document text
    • http://starlightcelebre.com/clients/4/43/43e9139217482d7666ce300faf566241/File/53862377913.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/vamaruzejosasutobikuwa.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/58341457393.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/43bd205f4b0b38aed7814f0acaef2617/28888921396.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160702c9bba106---jugefi.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/lenozivututoni.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/vedifezodabeketawusumatez.pdfIn PDF document text
    • http://lagrupacio.cat/file/90548075279.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/edf31e7f90f751b3dc463137edd29cb1/roxusitopilajomibe.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/jefufuse.pdfIn PDF document text
    • https://aashianarealty.com/file/falajerad.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/nemamisenudaxabexejowa.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160acf4906c6c6---88800856632.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=different+approaches+and+methods+of+teaching+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_off0000d2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0D 17816 bytes
SHA-256: 6d14bc1ccc720668883c6e80155c3fc4b61484482a31ed6264df0a9a6a52c003
font_02_sfnt_off00011868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11868 11024 bytes
SHA-256: 3d802bf9e59a678353a3671ff0d89e48a9e163cc15dc1d210ec09c7f7662901a