Malicious PDF — malware analysis report

Static analysis result for SHA-256 e19c7bf3bdc1c233…

MALICIOUS

PDF

76.8 KB Created: 2021-09-01 00:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: eef7d8be79b6116db8f4a0eb25b49425 SHA-1: 44026b61551cf3bae08064cfa1196823afeea178 SHA-256: e19c7bf3bdc1c2337014160042947f12d3bcf8792326c9e764591db9514cb3b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs, many pointing to compromised CMS upload directories, suggesting an attempt to distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9939

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://ags-sib.ru/ckfinder/userfiles/files/20284436994.pdf In PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/3758463280.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae45b1edd3c---xuvige.pdfIn PDF document text
    • http://extracam.es/app/webroot/arxius/file/kepose.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/99418854c928830026b8fb6931ed7a19/gipebuzilipeko.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/17305065299.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/mafuvagu.pdfIn PDF document text
    • http://madurastones.com/userfiles/file/82060384145.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/b64bf9a4fe35190362f3bd75a22f0f5f/81944587492.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/wonex.pdfIn PDF document text
    • http://geo-equipe.it/userfiles/files/77438384218.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/161256c9ed483e---timawupog.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/33474017055.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160715b31ec658---55461247956.pdfIn PDF document text
    • https://durgabas.coop.np/ckfinder/userfiles/files/rikesuzugabafetiwujowe.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/gukitixuvinunutenewizag.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/20773463974.pdfIn PDF document text
    • http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/80964206548.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606da347b6c90---gebetotovewurobis.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/ketetegepawe.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/naxugo.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/81a09612d44a47b1bca32e81f52aaf76/83766191718.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/qgnc64115obauu0vi1qshitd76/25733044005.pdfIn PDF document text
    • https://asiahijau.com/contents//files/91477495602.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/54306223175.pdfIn PDF document text
    • http://medwin.kr/userData/board/file/21753053509.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=sea+of+thieves+download+free+full+version+pcPDF 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_off0000c42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC42B 18240 bytes
SHA-256: 3384f4c2bfe0fbe19ac18213c5173c37c4b4956b6e0c02b2e6a0189809b37b26
font_01_sfnt_off0000f1fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A15 11044 bytes
SHA-256: 511d78d8d98fa0cb6c3192c03536f625bde4d7cb015eeb0eb3d2e8254a9a3db4

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