Malicious PDF — malware analysis report

Static analysis result for SHA-256 772ee632533ed2a1…

MALICIOUS

PDF

84.7 KB Created: 2021-09-04 20:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 27d9477b708507b50e083f9f30cae71c SHA-1: cb579eb952069fb0fac092cb9607a4b72e03cf73 SHA-256: 772ee632533ed2a1a713876b1acf80069fcad3f301816c81e67b1474adabf3a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://michelbarbot.com/upload/files/buxuxujo.pdf In PDF document text
    • http://marthomaiticherukole.com/userfiles/file/zijajevuwo.pdfIn PDF document text
    • http://leruichem.com/upload/files/zitamekimupet.pdfIn PDF document text
    • http://apex-architect.ru/images/file/83468082898.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/44523390369.pdfIn PDF document text
    • https://ivanamihic.com//files/mofokumolipanuzanet.pdfIn PDF document text
    • http://sineadstone.com/userfiles/file/fusogu.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c665cb84185---fafigasegepibofanin.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a200c776d31---98338288031.pdfIn PDF document text
    • https://gloriamus.org/Uploads/userfiles/files/35150339441.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/989ab557fe7e2a549f3c6dc30ccd58f5/38488231268.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/earnu05anudfg6c205qkm2hff4/lezujonolitadokax.pdfIn PDF document text
    • http://thevenetianmask.com/clients/71561/File/49845330211.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78243983286.pdfIn PDF document text
    • https://amgaa.org/temp//files/29323779327.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807b85d0d07---62226863711.pdfIn PDF document text
    • https://x-software.cz/data/file/gofewakazevegakefoj.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608421858ee10---1149635403.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/bazobeni.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/71a2c3c272452725032c2d9115de3818/kunodobopexal.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16093ae8281cf4---71969875269.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/33476570440.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/munozimifimokanetif.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/55073893504.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/xekavovagixorogemumi.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/794mjtnj5e7340isitkp92c07j/kibodo.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/t6njnteu5hi2kgaqbqb1tv73e3/temomejoxitupopazoxaxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=consumo+sandero+stepway+2012+manualPDF 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_off0000e05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05B 19348 bytes
SHA-256: 59e0e4d85b533d8a6d89695625dbbd90ebe22d297d835984fe5dd4f3567c8d57
font_01_sfnt_off00011282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11282 11088 bytes
SHA-256: 6376d7620a97128d3043a1b95606abf59175d31b13ca934301cfbaa6a0e5521f
font_02_sfnt_off00012c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1