Malicious PDF — malware analysis report

Static analysis result for SHA-256 87abab2e98641b72…

MALICIOUS

PDF

69.8 KB Created: 2021-09-09 07:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9754878fda01e59ffbebe9b80c755498 SHA-1: 9c266482022201b7e7fe69042a3ae872b5bc3352 SHA-256: 87abab2e98641b72d511412cc2598efc4503af8f31dd686d157be693fbc4e554
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of external URIs and link farm characteristics points towards an attempt to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/faxosoxegumiwuwakofugowi.pdf In PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/a2c60autqmn2rijnfgn470esj5/natosilerumenani.pdfIn PDF document text
    • https://szabolcsipeter.com/userfiles/file/27967706613.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/89724553930.pdfIn PDF document text
    • https://sskundal.com/userfiles/file/foperoti.pdfIn PDF document text
    • http://kelvista.lt/images/files/lalologozirogeburevimok.pdfIn PDF document text
    • https://projekt-lesen.de/userfiles/file/jiwinawiwudavixum.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/fegexudunulefisejom.pdfIn PDF document text
    • https://estoniapools.com/contents/files/gofodorevewuz.pdfIn PDF document text
    • http://npk-bypassdrr2.com/file_media/file_image/file/xifuxow.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/xuwetamu.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613586bb2c937---59940888562.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/bolusisogunogore.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16133e950bbee9---98488870038.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/89476219221.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/tiravorawexixa.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/5okhu5213bibub8sva6f2brfu6/kavegal.pdfIn PDF document text
    • http://marketingnews.fr/images/file/xufujinizafizofexodi.pdfIn PDF document text
    • http://dogable.de/userfiles/file/22866489748.pdfIn PDF document text
    • http://sweet-sugar.de/images/uploadedimages/file/texowubojalufedalarenu.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130962cc8c02---94869195047.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/lavudasotowego.pdfIn PDF document text
    • https://clove7.com/userfiles/file/gugonigexiponof.pdfIn PDF document text
    • https://www.hasmow.com.au/application/third_party/ckfinder/userfiles/files/gomipamuzitejovabor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=fifa+14+unlockedPDF 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_off0000b3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D6 10404 bytes
SHA-256: 23e53f781d9aee7870f5bc037e31facc04c90accac96549663f797dad292f918
font_01_sfnt_off0000cb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7B 15216 bytes
SHA-256: b2ccb12c6cfabd2d3e6c1402945e12246f1f4568c350c111f7c55d00df5ac814
font_02_sfnt_off0000f1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.