Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eda5f93e39cbd3b…

MALICIOUS

PDF

93.0 KB Created: 2021-07-04 03:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 93d11fff397932518f3d583c65058d46 SHA-1: 1c6269b9a4cd5aa5b55921eafcd17520d4320eaa SHA-256: 9eda5f93e39cbd3be989b44937709dbea2383737ec072555afd2d69ec879b737
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised CMS upload directories or disposable hosting. These elements suggest the PDF is designed to redirect users to malicious websites, likely for phishing or to download further malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pistant.ru/uplcv?utm_term=making+dough+with+hand+mixer PDF link annotation
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/bea4a93f2810e4026ff5bbcf2d83ea70/782759489.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/17545017075.pdfIn PDF document text
    • http://schokobrunnen.com/idata/xivimupezelowusobewitam.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/76765900191.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/l345upvio87jd24ldivve1fk64/fakepibebunavipimapog.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944cea01415---92663837780.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c0bc64953aa---jokogawalosi.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/itvck9gcv2hun96e8188bnvtdl/kiziwapigixenovejij.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c064137a77---jidejaniv.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/borozaxukonaresozak.pdfIn PDF document text
    • http://cka-shiba.com/ckfinder/userfiles/files/22524715455.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/6b97f8bb5452826e47a301cdf48bd59f/dojonegebapatofo.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/22771508233.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/sukilumolux.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/c6d143a829e67740c1c012435ecb3a8a/kamesokokaj.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/108c95bb58ec32e6f757015772a2c1e7/17758878950.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/a26d6812a5898f1e4dc96893c02da022/nuworituraraza.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/11360600215.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbadf1ca62---26530805551.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/7a539e22f8617f2955bfc6a2771f6084/66461257139.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/8396478711.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/9479c393692e118e644f81ab0f5bdc03/nodegugokodunoku.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F2 10856 bytes
SHA-256: 8fbfe172752eeb88aead44c30079eb594181b1fb22673d9defa83d34a9fe62df
font_01_sfnt_off00010aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BC 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_03_sfnt_off000137fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137FD 17628 bytes
SHA-256: 2177876ee4e756f11ec09cda96b38b56629b833689d89fab5d9485ce7e0abf7f

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