Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc94e90393aec200…

MALICIOUS

PDF

126.5 KB Created: 2021-07-01 15:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 9e5a34688c43044f37af5288aa5760b5 SHA-1: 92087daf18c5d3c373eaea2d979882415ec93045 SHA-256: cc94e90393aec2008ba8728b0142c2fb29ee159d2934767b7f5b3d1e53148841
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple distinct hosts, many of which are compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/1f348b1503f46b188f65a47662a41038/loginolani.pdf In PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/ab50cd50fc8e8320da899b84ad718b37/93786897860.pdfIn PDF document text
    • https://dcimx.com/files/72428920020.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-6/file/rinigiwarefiro.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098357c99a50---wagokadit.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/505f84f8ff2f2ae9c33a48d3f32164d7/febivunupexoluzo.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb0430a564---60131240822.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a04488b9b65---68438495687.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d26764caf1f---pabipaxovobobev.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/3553221739.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/mavumupurenavoxif.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c4eefe4d9dc---86946169955.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/bepotiwosimagobafovox.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607c487609742---69667513573.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/3a6349b0607dd600b860a19ba39667b9/pujejodolomezezosun.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32be3359d6---poden.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210630071536_tilo9n.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/88826418088.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/vuleso.pdfIn PDF document text
    • http://congtrinhnhaviet.vn/upload/files/mupefebipunegesuguxupeged.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/58877605303.pdfIn PDF document text
    • http://alfavs.eu/userfiles/file/46458067824.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=amharic+bible+download+free+pdfPDF 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_off00018f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F5D 17116 bytes
SHA-256: 4ae7b828cf838f9c1a08679209d3a817ead44a7bc714328c58fc0fc22c5ddbe3
font_01_sfnt_off0001bc05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC05 10828 bytes
SHA-256: 89dfba62af2f43d4e45edb5c0f87eb2fcda8ee5683276299f65be2c17fafc9ef
font_02_sfnt_off0001d498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D498 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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