Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabf70efc4376367…

MALICIOUS

PDF

113.0 KB Created: 2021-07-26 03:35:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 95059a30ee897edc1dbec0529928c612 SHA-1: 8f1ff06a18190d1bda4c366edb8b7c924e824cc8 SHA-256: eabf70efc4376367073c6d3fdea5a0a19fe547e258060018fe8c168c6d2c953a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous compromised WordPress sites, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The embedded URLs are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/80a91e1d016e4ed27ca17652b2107ad1/jimelazujurefexujodurom.pdf In PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e2e5eea07---teloterazurimirupen.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/22007237120.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079bd266f90a---3843114439.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/4hehk8c7k4u9gqocr0u98nvsg4/pewer.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/ludumuzamalakegesuxitimis.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202106291859111565.pdfIn PDF document text
    • http://charivne.info/images/file/wasupizobapepizidejuda.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/60543299405.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/0ce258fbe0845d2431f520df950d22a6/lemokibigejapominokax.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/sazuji.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e3a92883607---jabogiwobebuvurodetele.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d49ee2bf70---nudowaxalozikebalep.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/jipipasal.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/3d1a6b4106b5b13fd4ec8e6dcd7d689b/68920663926.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/tulodarutenas.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/52c7f444ccbc3a25f241fcb97af3a600/31404414582.pdfIn PDF document text
    • http://overtonnation.com/clients/f/f9/f97855507a39dfa58978186db9bff07a/File/sutizuxob.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/41993334028.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/34068635522.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/17279810439.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/63597386734.pdfIn PDF document text
    • http://teaandtiara.ca/clients/c/cf/cffd5a667a547ddf6f7ed7e454f715b7/File/56314932339.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd3324f42c---91071759797.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/e5b094933b0ae946313d132b7475225d/fekiturin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=tracer+tangente+courbe+pythonPDF 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_off000150e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150E4 19896 bytes
SHA-256: 4358b605573cef0681a07debd2487aa4905cc4be9b5d4bfb49f75671830c5453
font_01_sfnt_off000183d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BEC 10664 bytes
SHA-256: cd434b7bc0932375325331cd9fdf127ca706e6c0e0afb1dd296a67fa1429c4e1