Malicious PDF — malware analysis report

Static analysis result for SHA-256 945f04cf6d23caa5…

MALICIOUS

PDF

85.8 KB Created: 2021-07-04 07:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2e5de2514884c06e22cd19f981a0a333 SHA-1: 3448386c573c7f17956c8fae93ce66733765c370 SHA-256: 945f04cf6d23caa56ab9dda42fc7b1a010c91099049090b60bc32b09a3e831ea
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 and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to distribute malicious content or conduct phishing. The presence of numerous URLs, many hosted on potentially compromised sites, indicates a strong likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b3bf41f38---55913554516.pdf In PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e53ea2a88---zugimewetoligivebezej.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/eeh7m6oc28j7g194a60ic8lfj5/91394808129.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/55terjcj1m0vfuj4pkjj9epm1i/46511128710.pdfIn PDF document text
    • https://hanahana.vn/media/ftp/file/lawegiwuwexoledavorow.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/be34a1f58fa42c58533a7e73ffa53056/85404783863.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16089d5c422b5d---83205520391.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/aaab77a3bc5ad49c5f6e8687352debcb/97140415909.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/20d2ea43d47d0171d6594c8d7d4e6718/pizurugenesadelorediredu.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/73c872fbc23ecc88996f7336bb04bf24/zotamuraraguretaza.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097030eee3c7---27433169301.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/zuwuwulaz.pdfIn PDF document text
    • https://sofanet.ro/ckfinder/userfiles/files/fidarafomugitadefokopajub.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/968c26ea2c7dd81b7597271ecc0ce1bb/3295207449.pdfIn PDF document text
    • https://securitydm.com/slicice/file/sopawuvimatiz.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/1c7c4246cb5a723a5c223c04fbc756ab/46860256073.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/313d5f6966f2093c445271bbd3cf7ccc/13763963062.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/temizuwavezevigowaxide.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/gosezanige.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/82299404078.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084efb8e3b10---febogovobuxepux.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/j5lhij90dhueepsu3pr7hvu6o2/76454236776.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/84770600106.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=recurring+sore+throat+and+fatiguePDF 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_off0000eda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B3 16772 bytes
SHA-256: 9c074daff93b7c1290a255532e72e2114577bf0d33046f1ce4b40ce5f96d344b
font_02_sfnt_off0001313a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1313A 10852 bytes
SHA-256: 1b7dca6d12edc54b8f15351b702774e706fc71a4a9fb66c15729b794c9f8bf7d

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