Malicious PDF — malware analysis report

Static analysis result for SHA-256 3591832636a3dbb5…

MALICIOUS

PDF

86.6 KB Created: 2021-06-28 09:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 2ac20f38eb4be1f4135857ab8b56ef15 SHA-1: b65f1c59f8577e50264f92d47a5d2ecfb085bf1a SHA-256: 3591832636a3dbb511082daa16b6d4ec8fd1700e43907ae5f02e04652de6d614
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to exploit users by directing them to potentially harmful content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/7tktroknjfgg98u9sutnc8ed7q/8765495731.pdf In PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e7baa56d2---jusukupedetomofuvevafodi.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/wapale.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/bigajazapabemixumaditunot.pdfIn PDF document text
    • http://msamericapageant.com/clients/873634/File/genepibube.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/47f4cc4a64650cd9a19f0e6130c3e58a/39717075288.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/lls22inv8pg5d8q4f89drkrir4/79331452988.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/6015fd5cdb14838ec8d75dbc3ac90417/likobarotewuwo.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/mj6p6rkke14ubjfnem0pi6etj3/74802485374.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607feef369d2d---56486250405.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/d93e150391094eb8c7a047614940e273/88722480640.pdfIn PDF document text
    • https://ferropula.hr/files/mazigejenisawa.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/a284bdc1d2e8952335d53d5ca4ecdaba/vowusebulapeniw.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/537d412ccdead6cbe49b36fd754ba10a/fexawegimujiwojis.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/9d5f07d76894ff5c0d672de1859d417a/womijizafovusasuxatajetuv.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/adf0daa19c02794b534d9996729c83a3/21682322391.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/fozoxaf.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/3df03491d065afb4b853a7741038bea3/35163746023.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/286562009.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d45ab85e4d---kofidikivuj.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//32313361688.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/21299641984.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/72166759606.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ba8a23a12---babazeniko.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/67092028932.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=active+listening+process+stepsPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF175 10432 bytes
SHA-256: aeb3f80a90fdf4b3e6cc8e56a62ab8301bd3ae9e59a8ad562c02225482948be0
font_01_sfnt_off0001094a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001215c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215C 16336 bytes
SHA-256: 9077de34d712d0d6c341b175a1b74f7fe9f6ce7ebdcd9c3bb1daba659ead4ade

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