Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaebb08e84f77acc…

MALICIOUS

PDF

82.2 KB Created: 2021-08-10 21:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ac242d798b26cba9204802c5a26469e9 SHA-1: 512a5b9c5588927b828a785917f0950e4bb4cd9a SHA-256: eaebb08e84f77acc3ff6c24f1cbf96068f42246ed211ad73f6806980beec12d1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also contains numerous external URIs, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://sarlampa.ru/upload_picture/naxumokowizogewawazop.pdf In PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/62d00d0d537e33eeec1e389605bbf9a4/xikerete.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/jijaz.pdfIn PDF document text
    • https://get-insurance.in/ckfinder/userfiles/files/86399165791.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/8c6vbhgfpajreldeciqlv2fuve/nabafoped.pdfIn PDF document text
    • http://mlsconsulting.net/cms/files/File/judibobel.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/4f09432e7d673bc58b669ef6e90bdd9d/75962190462.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/f454471bfd4b215c737e081d06cbe50c/duwepuwagitagew.pdfIn PDF document text
    • http://hilltopperalumni.com/clients/9/93/936f23dc4abb03f6d4a1aae2c8a32781/File/kokilos.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/23f8ce56a90362af334ec04a0200329e/xijuneritexigogokujuwe.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/34004223601.pdfIn PDF document text
    • https://maturana.cl/upload/file/46806093108.pdfIn PDF document text
    • http://maekalocal.com/Maeka/UserFiles/File/bonuloxifabus.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/33f8e48e349eaff8b801b72ae5dd7144/bugufemutetivokilexelosel.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c2d74a7e4---74064907180.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160762606ed9cd---zatatilepuzevinexilu.pdfIn PDF document text
    • https://win-win-keiba.site/js/ckfinder/userfiles/files/5283737760.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/cpdr01nnrkd8u651eg9nufap8v/wipowarabawuramoxaderamu.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/fcc7e31e302fdb2544a8fab7ac562b92/visiw.pdfIn PDF document text
    • https://zold-kommando.hu/files/relawe.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081f36fc10b0---xijemosipelanominuwugad.pdfIn PDF document text
    • https://em.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/39919086088.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b2646c7171---87882228104.pdfIn PDF document text
    • https://zhansq.cn/upload/file/gonujafupunifon.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/dekulbaufffbc5digql6av3r24/lujosututeja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+unlock+all+skeleton+dinosaurs+in+lego+jurassic+worldPDF 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_off0000ddcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCB 16640 bytes
SHA-256: 1b72998a98d9a5794fa340b448262578a10b3ad7156802c67f0deb6078ec726a
font_01_sfnt_off00010916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10916 10944 bytes
SHA-256: 15cf874eccea93f3d939fa9d546f129ca01d06239057be30380e759f83141d27
font_02_sfnt_off0001225c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1225C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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