Malicious PDF — malware analysis report

Static analysis result for SHA-256 955f6cba75f02de7…

MALICIOUS

PDF

85.5 KB Created: 2021-06-27 00:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 9a9b9aa6fef30ef28ad69e0dfde121a2 SHA-1: 327b8ac72daec94bf4db062c46429cee411c62c1 SHA-256: 955f6cba75f02de78d605ef5e22f450aee3fea9fe12a8e04f99b9ebbdc982914
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories. These links likely serve as a lure to download further malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/6e6613ff9ddda9b8bdf1b9420f1d6e36/88487776884.pdf In PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/2hi38h5dc5k5c27tnqv7d7sfng/sagadubizedexixesevo.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606da4212c3d9---minexezujemupukut.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfcf2c4afd4---7803306535.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160777f0aa012a---wixanagituwo.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/tivuwewutimisadafuvivixe.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/87178360027.pdfIn PDF document text
    • http://eksan-ltd.com/userfiles/file/dazonoparosu.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/101cbe03e139a0c8856f6a5d56fe902b/19485592765.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/48135533259.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092b80268969---68297104642.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/kexozovegugarojo.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/e6eef6c4a930d8502c9a583ce5eef1b4/68714648542.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/ce6c57f993ad0c42cf8276af6669b26e/85313093156.pdfIn PDF document text
    • http://songiadahoaian.com/upload/ck/files/vigoxibofonetezega.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787faa8af2c---61060827748.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/34a3a8453a2eb453559f54a984c2294d/tajiwefagavuvimisota.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf65124e0a---zuzafomoduw.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/nomanunuwetekubafujabosax.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/06cd052e0106ea96a88c193f37c22d3c/mijor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=hip+and+valley+roofPDF 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_off0000ed1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001052c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052C 16996 bytes
SHA-256: 662bbef1bbd871aa5525e9652aad1a466389b17bd8255970053204ddd5add714
font_02_sfnt_off0001318a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1318A 10396 bytes
SHA-256: 6fc9c76dc03a85fa4e39dfd931f4fae539f2d95ecb8c10ff11913ce75a475547

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