Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff1ce64a596af2bb…

MALICIOUS

PDF

79.6 KB Created: 2021-09-01 06:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6a4baab262f4c706b3f38f10b479509d SHA-1: 88aa21669ee6815f47add6c8934cbbf27abcf5bf SHA-256: ff1ce64a596af2bb2e314221f5f2ced67474b1c98f61781eea3392576f5bb99a
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary function appears to be directing users to potentially malicious or compromised websites, likely as part of a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.nagsa.es/ckfinder/userfiles/files/newivafilu.pdf In PDF document text
    • http://masonhn.com/d/files/waburemarapavomovagajew.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106abada7834---kenunobumiv.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/65290667400.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077100c21d13---18955269929.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/37584242729.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/c4er6qco7egd2nhu32c2oqipo4/24071053681.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f66b65c77---malalutijusiforewixe.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/58277517813.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/godumezibitav.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/73505486115.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16092e416ad878---kunidud.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/35070318946.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/36895032143.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/k9l4dahoeup42j96kagli9l4ib/94377412974.pdfIn PDF document text
    • http://crackershrimp.com/file_media/file_image/file/lifogilotixixi.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/wiwerujap.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210828092945.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/b7580a93e85a3e8bc9bcdf4938bff9b3/7458934617.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/95710747782.pdfIn PDF document text
    • https://geneolock.com/ckfinder/userfiles/files/livofuvezukebetosebuleno.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/30278759392.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/28469114743.pdfIn PDF document text
    • https://guclupin.com/calisma2/files/uploads/82312028015.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=tri+tip+roast+slow+cooker+recipePDF 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_off0000d3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AC 17296 bytes
SHA-256: f6c74044499b7f02d6b40b56bd4a5d6ebbda38579eae88b81171874c3fce5d38
font_01_sfnt_off000100b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118CB 10404 bytes
SHA-256: e91de843d933b8c862faff4e9dc5238cc123e84c663d4e0e342f4b567651bb25

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