Malicious PDF — malware analysis report

Static analysis result for SHA-256 16eab9fd13c1717d…

MALICIOUS

PDF

103.4 KB Created: 2021-07-16 08:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 927801233e7a189874a800e61355d15c SHA-1: 894978bb218a33c98657181bda3a5f02d1f312e8 SHA-256: 16eab9fd13c1717d7c60f9b6de36f09147dcd8a33abf429808a6ad546975e264
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9773

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://nomylo.ru/uplcv?utm_term=cat+previous+year+papers+download PDF link annotation
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/3rt67k349v3jacl9r472ircq3r/wekebesorupibad.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f66348663---xobebewumimemub.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/0bdd6020b040e87bc58363fee2ed6969/wadokodovedari.pdfIn PDF document text
    • http://dietmoiquangle.com/webroot/img/files/jonoboririki.pdfIn PDF document text
    • https://aksusu.com/upload/files/zitusuzimo.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b212ea26d0e---voxakafogapixigalaj.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc490270d5---kixojugaridik.pdfIn PDF document text
    • http://anjilh.com/uploadfile/file///2021050100462536.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/joduwugetepax.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/wawuranapunigerox.pdfIn PDF document text
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/21405824351.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ab3e2f680---piwekeboz.pdfIn PDF document text
    • https://anakmeong.com/contents//files/nikugopefukeve.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/63782594646.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/meuksko6qdnn8m180l188ulmcv/53697726066.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6d1a52cfd---6877456662.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/64570951186.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/55225493405.pdfIn PDF document text
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/51744273041.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/79168311909.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/nufegogex.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/bcus3rftf3katfdkhb88geh5it/79450192049.pdfIn PDF document text
    • https://c-effeimmobiliare.it/file/wirejebudo.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/28798695450.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/janovalutitexuz.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/2bec6f7581e0ce780f4ee52bcec8aee1/95903365249.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/c56b2fdbb97dddb9e0ff0350ed528e81/5262561636.pdfIn PDF document text
    • 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_off00012f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3A 10784 bytes
SHA-256: 6cceeca924425e58b9e9398cde2aa9cb46d4ebf4bd1ec3aa53996868c6db3cc2
font_01_sfnt_off00014846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14846 17572 bytes
SHA-256: 41825039719e151c2dd698e89558a2955cfa2a8ce8e232072253c956a80e7360
font_02_sfnt_off00017688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17688 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.