Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed418c2e760e747c…

MALICIOUS

PDF

88.9 KB Created: 2021-09-11 00:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 75b5b43e3c55c451a5a52d66c384ca23 SHA-1: 0425986225e44a26e1aad93464936235a4118afa SHA-256: ed418c2e760e747ca8badf3965d0d961dcdb50a0d17bfdd4111523071d91c1fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It functions as a link farm, directing users to numerous external URLs, several of which are hosted on compromised WordPress sites. The presence of embedded URLs and the nature of the link farm suggest an attempt to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://inwebjor.ru/uplcv?utm_term=ps3+emulator+android+apk+free+download PDF link annotation
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/e5fef5a0c488bd860ddcedc4db4a2f3b/petonudevevene.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16135f93d2840d---76626403765.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/lamifabiligiweku.pdfIn PDF document text
    • https://seerupit.dk/assens/file/farelixofupuruleneg.pdfIn PDF document text
    • http://fabrikando.com/cmsimple/images/file/43721996315.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/826f7884447030364ced397f73f5208f/lotidotuzas.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/zebazoda.pdfIn PDF document text
    • https://maggievanostrand.com/uploads/media/file/tojinekaxaluxagi.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc796b6a99---45414057118.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/66d1df9a9c73835205c44afd9edaca6f/73592239958.pdfIn PDF document text
    • http://quiltingacademy.com/fckeditor/userfiles/file/nanirokosoletadasu.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/36729390669.pdfIn PDF document text
    • https://searchlink.org/userfiles/file/34464894525.pdfIn PDF document text
    • https://wanna-drive.nl/files/File/rutexovorutejutuxiwo.pdfIn PDF document text
    • http://www.majbrno.cz/uploads/files/nefojawuxitanipuvizitix.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613453066c820---fumojegepo.pdfIn PDF document text
    • https://ecohort.info/userfiles/files/88525125170.pdfIn PDF document text
    • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/satatisuwezuzitavuv.pdfIn PDF document text
    • http://dotbamboo.com/file_media/file_image/file/jonejubeleroz.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/refesaxapojuzagel.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1613736c4a9842---79464735221.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/gabaresunivemonajizomuj.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_off0000ef7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7F 19760 bytes
SHA-256: 027c1c80c214401e9c3c6dbe8dc383239e61a4c040f537dbf4631466f2cdf3e2
font_01_sfnt_off00012374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12374 11112 bytes
SHA-256: d29fd54d58eaf3a8c7281e290b72d14946fcb1fec1db52be54a7284b454060d2
font_02_sfnt_off00013d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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