Malicious PDF — malware analysis report

Static analysis result for SHA-256 2daa366bdd320702…

MALICIOUS

PDF

112.4 KB Created: 2021-08-01 08:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9bc3169b401dad0d53c3d17b67eac4a9 SHA-1: d1ff7d66d60e2a880c5c240b281d33fba09144f7 SHA-256: 2daa366bdd320702c68bebd0d5e427ecd2e34585d187ae2a4c7a799df02bc0b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9598

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.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c95d77d1dca---wetotilapate.pdf In PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fd490d1ebd1---vubeninamemipukusimof.pdfIn PDF document text
    • https://codecs.roimages/file/sijidoxuta.pdfIn PDF document text
    • https://gitedu.in/ckfinder/userfiles/files/55225357693.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/j0m61u85gvh5oco4ui618d0ctv/93872444102.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/fapakizobagasow.pdfIn PDF document text
    • http://marymo.ru/uploads/files/zoporurudiz.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/midewodonaxevetitobagur.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/puligoxobidareva.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d50c67a282---lojamuragejujutozarota.pdfIn PDF document text
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/57533195541.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/ba4791c9366c70619b31db133e23a748/44182229853.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d02c807b4004a047a08defbdad4e32bb/62125758688.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0939ca54ad---41667410831.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/a33e4c110d7963ca09c0458ecd7d6fc1/43205399048.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb095ec2b3---misozotakexipopanevev.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dezixoxijepokijalejixav.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/2740951032.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aee389c1441---xanisugobudopoxe.pdfIn PDF document text
    • http://nineslash.com/user_file/file/81542370601.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/b2f6865d66fdaf1f2ea187195b87ad9b/zufuteligatisimewipize.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16079e2275cb34---dasisalirunilitefarewar.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/viwurawuvape.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/f787385aa677e2e882d3f779a005dbff/15574917113.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/zibogaw.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/tup40lcumi4e0mufkrlttdmuj5/28444633209.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=naruto+shippuden+ultimate+ninja+storm+4+gameplay+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_off000137bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FD4 11236 bytes
SHA-256: 8e88da708588bb4924c00ead420b52c8e8d4478230d93eb242f5d42f85ad4394
font_02_sfnt_off000169cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169CD 3388 bytes
SHA-256: 7a8210c6a013e7b028e571cdec1b4f5ba370c679bd1f4dbc42e400200196bc7e
font_03_sfnt_off00017768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17768 26596 bytes
SHA-256: 118e2240d529acd03da237d589891cc8e4d4ae829a159b296ce5afbc6a28a2e7