Malicious PDF — malware analysis report

Static analysis result for SHA-256 546c34047eda59c7…

MALICIOUS

PDF

82.8 KB Created: 2021-09-08 04:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d77edc496775e1d0a3a79c2ba0e04eb4 SHA-1: 6c4007cbf4e29bf779e9236d4299c04943d3e50d SHA-256: 546c34047eda59c7043c635294f6fc369db38650f27afeb82610e8bf7c2f31b9
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for further malicious content or phishing pages. The embedded URLs and the nature of the heuristics strongly suggest an attempt to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://cructi.ru/uplcv?utm_term=teorema+de+lagrange+ejercicios+resueltos+pdf PDF link annotation
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de906b5b0b---nebegemexosu.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16118ba922274e---gafuxogitud.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/jitokib.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/rotunilifex.pdfIn PDF document text
    • http://berkeleyhigh64.com/clients/9/99/99a482d4bd0dc5522cc24ea7f8204a07/File/fijukuxixegut.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cb1cf5e43d9---81252491056.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/13055011184.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/7ef80a171c8e61be0667dfdbbfb4f1b5/58440198383.pdfIn PDF document text
    • http://xn--krmer-dnnebacke-1kb72b.de/files/file/63698640095.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2553b0ad0f---59226110503.pdfIn PDF document text
    • http://drive4smilesquebec.ca/clients/f/f5/f58105ca183540932673f5bf18e62671/File/xizukuwixazanuvotirav.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/14771156904.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612393f85d77b---83216803808.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/wesaruxodetariwuwupe.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c485ee55d7f---pawubixun.pdfIn PDF document text
    • http://unionnutritech.com/upload/files/gekaki.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/xikutapowewexefexom.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/79914009759.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/75404481716.pdfIn PDF document text
    • https://birotex.rs/images/files/fobetamet.pdfIn PDF document text
    • https://biovuspharma.net/userfiles/files/lekavoriruvuzeser.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160931dfdbf5df---28361956616.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/59733024427.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16108c5d719009---81082017615.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2eb23615f9---saruwijafofarovozub.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_off0000d89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89C 19416 bytes
SHA-256: 32ce18bfe922ed86a76cc2c2b6e3cd99e123e794be454c37b30eb7158fc1fd00
font_01_sfnt_off00010b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B29 11156 bytes
SHA-256: 11691982ac3563f102195f18682be2d372a367c6fef257d8b9f5221ed34e568a
font_02_sfnt_off000124ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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