Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d579d8c4479a89…

MALICIOUS

PDF

79.4 KB Created: 2021-09-12 19:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8aa3460994b57323377961c1058c8ef4 SHA-1: 176fc3b7b500f42b93d432af75e9c1b593d4767a SHA-256: 47d579d8c4479a892e59202f6567cb6a00130eb7c2e0411b0106511c3f44b660
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites 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. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

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://xn--2osv9pt2jfpt.com/uploadfiles/files/27214263878.pdf In PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d60f10cf29---komedolikeseruveligojadu.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/25028298554.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/kurufatixulo.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/81344460506.pdfIn PDF document text
    • http://studioagm.it/userfiles/files/45563195623.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/bef1fdcb64026390e87e308e3132417d/72497833223.pdfIn PDF document text
    • http://baoveantam.org/upload/files/fexejoxuxevobep.pdfIn PDF document text
    • http://dunakeszi.varosom.hu/userfiles/files/15202974501.pdfIn PDF document text
    • http://prmakeup.com/Image/files/40634169673.pdfIn PDF document text
    • https://hkpefa.org/editor_upload/file/66533951718.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/relejufozoxorijikorip.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/86475471882.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/ec83cbb51a61a327a77eefc7cb33d83a/78509691433.pdfIn PDF document text
    • http://twsl.mingann.info/upload/ckfinder_temp/files/20210909012707.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/timekimuzidojegumopolipor.pdfIn PDF document text
    • http://kmsenior.org/file/files/gozetekazokune.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/kalawewidajod.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/43173052933.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/68021266521.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161393fa77eaeb---xorebudolegale.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/35569951612.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/29599866734.pdfIn PDF document text
    • http://kiszelyugyvediiroda.hu/docs/file/86451395678.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/42276202400.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=durango+wildlands+play+storePDF 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_off0000c805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC805 10868 bytes
SHA-256: 2fb75c438836cf96dcc5dcac6bbbc03e9f204aaae99dfb93639e317829db7990
font_01_sfnt_off0000e11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11D 20780 bytes
SHA-256: 1356493edcd57c2d8e8015698dce70d7f759a58fa0fcdce367789305a0d01469
font_02_sfnt_off000117a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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