Malicious PDF — malware analysis report

Static analysis result for SHA-256 956eb35222c9e452…

MALICIOUS

PDF

89.2 KB Created: 2021-07-29 16:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: b692e3a6dea327249af85f04f2305dcd SHA-1: 2fc71fec06d62feb1f7215a6b2cc39cc5a83d4d6 SHA-256: 956eb35222c9e4527679a6d13a930e9ae5c8e8062f55cd245c37a8a3f9200bfe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as a link farm and a phishing/malicious document. It contains numerous URLs pointing to compromised WordPress sites, suggesting an attempt to lure users to malicious content. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a58f75dcb---31864405094.pdf In PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16096a75834098---fanaruguk.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021062913023073499.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d66da06cc2b---17236026101.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/lukisonunazewiwatetara.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/cba06edba881e1063e081733249df4eb/76355504776.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/87159me01fmm0des7rk5gravl7/dalajuxiw.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/43c8d7926754ccd7af575406d64a5079/75194259633.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/38683465098.pdfIn PDF document text
    • https://semangkabiji.com/contents//files/tenugudafowomefonumod.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf4961cb04---87806955836.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801ffc2e7d8---35446393326.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/97799358931.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/4c8c097674f1cb046c501b81f2365846/65336275869.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/43244501050.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/7912263364.pdfIn PDF document text
    • http://inglewoodreunion.com/clients/68690/File/nudiwovedisedar.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/69029865449.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16085a64b4a25c---mozab.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5ac916be2---21816964278.pdfIn PDF document text
    • http://519pf.com/userfiles/files/45347257263.pdfIn PDF document text
    • http://didopack.com/files/76871403248.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/31324603433.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16079acf7adf3a---rediwutopekaga.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/dibimitowuje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=writing+practice+sheets+abcPDF 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_off0000f790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF790 10620 bytes
SHA-256: b0e0e1c1d3ac6a5b055435be8953119c1dcf67e85561a41a8bb9fa16e0bef311
font_01_sfnt_off00010f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F98 17608 bytes
SHA-256: 2ff8ca03c5da0550628c4ff319f35d65c99581316e0664f85ac43e7cfe83ba88
font_02_sfnt_off00013e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1