Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb3daf9f6fe1ece…

MALICIOUS

PDF

98.3 KB Created: 2021-06-30 20:38:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6fc6025255216f472e729eb11d0dab45 SHA-1: 688e4fd5e8b97da5bb566bf747b20af829da14fe SHA-256: edb3daf9f6fe1eceee1e854dfcdb512123f67d196e7cd5231985e5928bb68602
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://alphabodysupplements.com/newerac2c/userfiles/file/fibuvoxuzevonurab.pdf In PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/br9s7drleembb32dgsagoktei3/xosope.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///95133622157.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/37510649588.pdfIn PDF document text
    • http://nandeestationery.com/userfiles/files/84493301914.pdfIn PDF document text
    • http://teakdeck.pl/files/file/sorukuxopipokoporo.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/52905489348.pdfIn PDF document text
    • http://blissworldbeauty.com/newerac2c/userfiles/file/wobodob.pdfIn PDF document text
    • http://beiks.info/public/file/jomutejexajopeponajeme.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a40eec9e76---47020825073.pdfIn PDF document text
    • https://rosycaffe.com/file/51013736779.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/81148363762.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/23389098929.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/064ac81c2e0e7c1a01c12f9d622b7dbe/76973684514.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c30f36c22b2---koronilefodinuroputowot.pdfIn PDF document text
    • https://iwistw.com/upload/files/35851879017.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/85904740996.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079168089a9c---noleseg.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160728e5eeec2c---94921869969.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16086e244ace38---78894630073.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/xafan.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609446e1b943a---50536490739.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/bab431d34b0acbd22810a358f13db26b/98328117261.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074012474c1e---gipazoxaduwozanezerales.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/jscbmo9ch833kpmuf64i0soopv/polugotani.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=eschew+the+implement+of+correction+and+vitiate+the+scionPDF 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_off00011e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001367c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1367C 16780 bytes
SHA-256: 0b00eb28a12a8995608810d747769a44676e9e016b36ccdfc0aa2716521fd075
font_02_sfnt_off00016234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16234 11020 bytes
SHA-256: 2a52a6deb63f992bcfee8f528b39a59676e708d9389cd341305bf05f350537e2