Malicious PDF — malware analysis report

Static analysis result for SHA-256 729461ecabef4f1b…

MALICIOUS

PDF

198.8 KB Created: 2021-06-20 12:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 351d1b79722561c6e9a0d3235c796610 SHA-1: 94bc070368c6ea31bc16ef55664623fd03483e56 SHA-256: 729461ecabef4f1b39d7439d415f0818bfc705c001ca3333dd622f1a3b36800b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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.
  • 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://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4d32de13c---melafakobuvonosos.pdf In PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5f1de21045---79092745213.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/4339366433.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/f13c031e1ac303351cc4f74cf4c351cb/bajafivo.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/bada518d3c2c3534fbd479b6d7ab868d/22622622499.pdfIn PDF document text
    • http://stevis.cz/files/file/74575472218.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/820b73f1d045e4abb84289150779c2da/28182128585.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/77e0b5ca407a2dd811e071e97829ad7f/wadoxuwimi.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/novidedakal.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/32731811465.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/velenufafiferagamifitepu.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/55299990733.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/ec6c5673cf1e6efb82b3badea0fc2e7a/ritikalalejuxemu.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c777f21dbeb---wedixakezupolev.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/zanufuloxujexevivizufin.pdfIn PDF document text
    • http://tate79.com/clients/868750/File/37940837888.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=princess+agents+season+2+ep+1PDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/59bc6955f0ac48913d63f6fdd2d3fd75/59116056527.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0001152c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1152C 151304 bytes
SHA-256: 312067f7700a9a6223163df98673d24488fdc55aa707b7213d54c93b3d24607b
font_01_sfnt_off0002d44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D44F 5256 bytes
SHA-256: 82c26347124732ef21da6c0f811fcc187d7d9e17044b6716f1339eb5ae95ca5a
font_02_sfnt_off0002e649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E649 12332 bytes
SHA-256: 0483906a99d6e4a465e781f81059f4e31749974e9569dc701cde6f74fbfda4ef

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