Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d5c71d11bad3bc…

MALICIOUS

PDF

77.3 KB Created: 2021-09-04 05:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9cbc195d38a086578afa3f60f44a233e SHA-1: 28c328fecf9915212e942df2bf03ea59e43d5e2e SHA-256: 64d5c71d11bad3bc4f0c0c2fbf0c33a3ef30c5042508afc06fe68533e5631847
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it is a link farm and a fake invoice lure. It embeds multiple URLs, some of which point to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://nomylo.ru/uplcv?utm_term=explain+different+types+of+vouchers+in+tally+pdf PDF link annotation
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073ab82ac1ec---kavemamotilarefe.pdfIn PDF document text
    • http://ancient-theater.gr/media/file/simiwusiwavupirativi.pdfIn PDF document text
    • http://centrlita.ru/archive/image/file/89353862206.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c28e6975585---38180953426.pdfIn PDF document text
    • http://gyogytornasz.hu/editor_up/77301683551.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/rodewakuzeke.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5f4b5ed77---zoxaxewikogin.pdfIn PDF document text
    • http://phuclocvienjsc.com/uploads/image/files/panoximumad.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/xujajiduvisegaguno.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/56733478018.pdfIn PDF document text
    • https://shaplaconsulting.com/app/webroot/ckfinder/userfiles/files/13675859508.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/bssgkhc8et9e53tuv1om9m8bs7/famitivuxasimokize.pdfIn PDF document text
    • https://network-italia.it/file/1773340957.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9bc69e2716d86ae714a7a6743496a79a/97495123362.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/70091145847.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/gegaxijixuda.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094572b1634f---61824403983.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa1e1ec223---pavuk.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/b14c544622fa61e296fcbcf45c8ed048/togokojelidogevubu.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/6f3bfc4a39ea67fe7e086adbe2372b4c/sofosapawonuzer.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/gudixukexuvimiv.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/6de6a7c0d4a3cb12e99c7a7b48214032/zedetewojupos.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/d122ee47da2e46b245e488c7e04f19b2/78574937382.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/97b709f4c7ff5e8811bdf98d4838e280/meranorumelunedeforut.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16096232988ceb---fupivegubexiturimibajox.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/rcd4ha490fb8fo1bfhq29rpo0b/46808909446.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b33580801---89847522113.pdfIn PDF document text
    • 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_off0000c7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BE 17788 bytes
SHA-256: 989020ac20a2861d00facd504920aa57c6458ec21190fdcbbcaeb865d05cce82
font_01_sfnt_off0000f585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF585 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9C 11080 bytes
SHA-256: 0b768e8f84f849ae6bcf0cd88ddda9b3e5564c3f22721897c3318b79edcd897b

Open this report in the interactive analyzer, or submit your own file for analysis.