Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1b777742e83267…

MALICIOUS

PDF

109.4 KB Created: 2021-08-19 20:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f9f9fcfab9b8d76d8358b94e8b66d2df SHA-1: 2c0fb123feb418c1a0af043e565a8b14c9365831 SHA-256: 2d1b777742e8326785aa6619e6d3a8ee3e2e679445af7b50edcf0c80681b06ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites used for hosting further malicious PDFs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to external, compromised resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://pixomot.ru/uplcv?utm_term=open+crown+chakra+guided+meditation PDF link annotation
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/387b31613a1a9e90f5393ebe1b53974d/miwuwebomorokedegulirati.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/92733147186.pdfIn PDF document text
    • https://andrejc.si/files/file/17380747724.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/46f9db36d6a239cde0db19f82eb3336e/ganunugotufa.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca5ff3acc5---27800483670.pdfIn PDF document text
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/bavesekozuxenopes.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8540de9c5---42397812416.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160766653052bb---44766979591.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a7556d40be3---pufedexuzife.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/90418822672.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/26698319520.pdfIn PDF document text
    • http://atletika-pardubice.cz/files/file/52128514013.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c54ac758e2---tokafokinetuvekoreme.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/u7f5bthg1qmp7m6l1e8083higa/58513990572.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/a339a85e51b5c8475d9eebab0fb1b8a8/47978060597.pdfIn PDF document text
    • http://cathayred-csr.com/img-cathay/files/dokepovexoposogozelisuwu.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/gepogulibimusewodu.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/48fee8d9de909f404691c205936a95ad/16176509965.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/26485e3dca40eb42cadc0de3ae6da1d0/zumumo.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab99ba5856---bojovig.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/fqbgpj81s4gcpmqecm78e9sd65/79514187025.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/19539739003.pdfIn PDF document text
    • http://iswii.net/ckfinder/userfiles/files/17709621743.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddb393dd095---sobadewukaru.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acee044f0e2---46491365400.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://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_off000148b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000160ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160CA 17212 bytes
SHA-256: dd678204675b9c63f2ce40894973dfb16c47d47ac83decee31f54b36fa9731b0
font_02_sfnt_off00018d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D91 11048 bytes
SHA-256: 1829d754948b9d265d9f62463271b8057f788f4615701fb6cee412cdb2d3e347

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