Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba00dae4b57c9c7…

MALICIOUS

PDF

78.1 KB Created: 2021-09-07 11:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 600871e116bdf13126c4cc1babd38aa1 SHA-1: 55d2bcdefc9884aa83617fb7ad31d9cc8a9bd880 SHA-256: cba00dae4b57c9c7bfc80af5995fa603e041c4f7e55d52c29424c2a21d83b254
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised CMS upload directories, suggesting a link farm designed to distribute malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to deliver a phishing payload or further malware. No scripts were extracted, but the PDF structure itself is used to host and link to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948dc35232e---62316668576.pdf In PDF document text
    • http://menloathertonhigh1980.com/clients/6/6f/6f83464fe0b13873896cace574d4baa5/File/95752430436.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/nufumopoluludusezawinanuv.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/f70d945ad209644090e6bdf71c865eb3/14367245055.pdfIn PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/memolifejowuxurejuwozesa.pdfIn PDF document text
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/darajajugevesab.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/76714615041.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/15146265979.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/2arpnlkijgsplnd3jma5ghk1ef/pazosi.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/luwatukijujifafa.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1189ca8294---kukase.pdfIn PDF document text
    • https://gedayapi.com/userfiles/file/davejabojixagasidejefosaj.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc9240109e---renexevebamul.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/73624503358.pdfIn PDF document text
    • http://plncse.hu/php_data/file/piwefewogugudovejunir.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/tupejiludon.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/2bb0f2c60a6c81337b06f7fe5f189fec/14407871648.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/sebewozetalofu.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/64010748119.pdfIn PDF document text
    • http://campcolefamilyreunion.com/clients/82065/File/fovutem.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/nuzobufusaxevezawotoxeba.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/wiwovimor.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/c7b6b15c834ad5fdf3f3bf813d70d47f/xubetu.pdfIn PDF document text
    • http://ambulatorioveterinariosantanna.eu/userfiles/files/getepabilikawaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=sym+sport+rider+125i+service+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_off0000beb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C8 11336 bytes
SHA-256: f2c6e08427d7f1007957e7f2428422fec1f6325a45eaa9401a805559c8bf314b
font_02_sfnt_off0000f18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18E 20924 bytes
SHA-256: edd0d23cb11a39dffbc3f39b27bbb87f6aa1af8a54eea74dd7f66481e90180d0

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