Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabe54509df7436d…

MALICIOUS

PDF

108.1 KB Created: 2021-07-28 12:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 52059a80e6728fa79bc4927cd820d189 SHA-1: 67086a2a3e8668bc58050fa269f415b93c37f05b SHA-256: eabe54509df7436dcf1da786e6000a18fb6b552ba2c4fe44bb24a3ddc3d26894
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 a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV also identified it as malicious, likely a phishing or trojan delivery mechanism. The document body is unreadable, but the presence of numerous external links suggests an attempt to redirect the user to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://gdwtechnology.com/fckeditor/file/58108475756.pdf In PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160764955bd66c---botexiv.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/702ed70ce336dd13aa03895d852064e0/44340403581.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e73a9ac352---72283957509.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8532a4c81d---funopoxipeturofisefe.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/01bbc67cc0a4f4b1e34870602c98e310/51864724454.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/mixibedo.pdfIn PDF document text
    • http://lucann.com/Upload/file/54516200577.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/rasoxakires.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/ecec33036d9c81644b0d02046fd4ab83/sigipevodidege.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/to2piv5mmv1rabavulm5mpj8l2/tixurugawefexeniveromorol.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/cb5c16b08925a50fdf029c3d151d6c3b/jagarigedulubi.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d315918c10---83589562119.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/temefil.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/e6e9bb4f03c53bfee466d8222e02ea57/lomitozipovatepetuv.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/17786092738.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/3up44vn2ncf4rdff5kt2q210p6/21784901770.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/tisenenozidebugisala.pdfIn PDF document text
    • http://iktoktatas.hu/files/file/sibabidebutuxabelejabirup.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/627b2eefc3225552baab558b36f8af47/23512246953.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160986e1f068de---lagufamifosolareravimag.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/sumizefulasu.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/e20431760efd3ccc3d3f71598b0dbcdc/26078568216.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ce89dce3e---vosakatozozoverowuramuro.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16082a5293a882---poxogux.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/m3onensm1erih8khnvv09ouob4/xivajirajox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=va+peer+support+training+manualPDF 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_off00014032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14032 19024 bytes
SHA-256: 1ca4b2346c2696c98bf2bd1493ee6c9ea10ceafe5ac7c8c03da5d22c1988f7b3
font_01_sfnt_off00017188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17188 10664 bytes
SHA-256: ffdbb8e78a90a0addf792ca7c79a1c31011e1a9b5a128c5756675132329c90e2
font_02_sfnt_off000189f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1