Malicious PDF — malware analysis report

Static analysis result for SHA-256 cadddf9e07587bee…

MALICIOUS

PDF

70.0 KB Created: 2021-09-26 06:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 93ed0b8ec2623c3261f7f6537025a89a SHA-1: 6bc7829feb4b7aac9bc87798991160c889f36179 SHA-256: cadddf9e07587bee2d53527f64d59ed4486c1223af46f257f73da398fe269111
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress installations and disposable hosting domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The presence of external URIs and a link farm suggests an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://houselandia.ru/files/tedofituxaza.pdf In PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/1mquhnsci4b1upsuo0esoguqj3/83202872317.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/dojofobixanebonokuzowam.pdfIn PDF document text
    • http://naturalwonders.com/uploads/files/derakiborolawekiturir.pdfIn PDF document text
    • http://iwayman.com/uploadfiles/file/210911054619198838k16de7.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1614ae85706e25---53359416311.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/xejanarevavuwaja.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210921_055829.pdfPDF link annotation
    • https://beldapin.com/calisma2/files/uploads/mizamedi.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/utqfbv73ut8bf3946r79sb6b65/gudugiba.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/bekijolejobemimi.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/aa3f76abbd4fbc51bd42c68d4204ff08/murutavalinagomuz.pdfIn PDF document text
    • https://praktijk.zorglink.nl/ckfinder/userfiles/files/83310791724.pdfIn PDF document text
    • https://valgott.com/images/userfiles/file/diwimaforuxorap.pdfIn PDF document text
    • http://vigova.vn/Images_upload/files/mezosipexukol.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/kororoxufoduzoxopil.pdfIn PDF document text
    • http://bn-biz.com/userData/board/file/wivizekipofofir.pdfIn PDF document text
    • https://scout-educationguide.com/userfiles/file/forasatexapitoguzusaz.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/17297303664.pdfIn PDF document text
    • http://eggtesting.com/admin/uploads/file/metotitizagesaxidakap.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/wuzazigake.pdfIn PDF document text
    • http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/82160435240.pdfIn PDF document text
    • https://ladida.asia/sporlegen/administrator/imagetempfile/26511088498.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/juxipowixabinezak.pdfIn PDF document text
    • http://kanalizace-ul.cz/userfiles/file/88872612204.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/lojilofimijugagefedaserid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=top+and+tailPDF 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_off0000b5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5F2 9948 bytes
SHA-256: 00649da28526d7be9f1d171f8db5988911ac398c61972d190ef46a8782b552d8
font_01_sfnt_off0000cbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFB 15068 bytes
SHA-256: 10736a6ea9c3e6145bd56e2b6285a26b6463375c78f4a24ed97e85108eaf5ffc
font_02_sfnt_off0000f250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF250 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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