Malicious PDF — malware analysis report

Static analysis result for SHA-256 f744f08480a23cd6…

MALICIOUS

PDF

85.5 KB Created: 2021-06-26 14:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 01abffc8231a7d75dac9b3ad46c8ce2d SHA-1: ad3c2709f7a2eb3f60101a5e3cf0bfbcdbc7019e SHA-256: f744f08480a23cd6fcd82b7ea9077f1351979448a532cb39ba7d6227eceb98ea
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these external links, which are probably used for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c966ee1f545---46909066532.pdf In PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/d8cd13008dc2068d5123405d7e602c46/nomaxe.pdfIn PDF document text
    • http://bodegaadrover.com/userfiles//imagenes/11029786841.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/sotabesarepevofotu.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/57947425981.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e51a634357---daxafaz.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/jesufazefufetun.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/pixowolixuzemiguvezuxineb.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/75760136751.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/22boksr5ne6kf9fme4d23accj0/18998043841.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/54248aa360f51cc382a58cab8e8a2994/dinofivoju.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/97690907829.pdfIn PDF document text
    • http://blsfamilyreunion.com/clients/1/11/11e20eb1c47c3498ff3e66fc1941d138/File/97384450622.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/7435936885.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/popozike.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/431472917361b5216b6369f163f3765a/sufuteganumivu.pdfIn PDF document text
    • http://sharon-barron.com/userfiles/files/zetuber.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/seliwobidevunagiladuj.pdfIn PDF document text
    • https://a5productions.com/home/a5pro/public_html/ckfinder/userfiles/files/85525034097.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/voxijaredipekojadazeriw.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6874e35c28---tisoxegufok.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/11092764227.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=git+reset+branch+to+specific+commitPDF 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_off0000e8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FF 10876 bytes
SHA-256: 1cd63d59ddeb87bb029c430158633330a38d5e2fbbd274d6d76b2289ee4185c2
font_01_sfnt_off000101c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C5 17900 bytes
SHA-256: 3db71167d925fb3a2ca753231184467d24828d6508b990d772548d568a3f57c2
font_02_sfnt_off0001308a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1308A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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