Malicious PDF — malware analysis report

Static analysis result for SHA-256 025a4111dd393da0…

MALICIOUS

PDF

86.7 KB Created: 2021-08-07 21:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 912611c28e3c0d1ba020d090b1dcb029 SHA-1: 1e2e1d5645019d37d254a4b42a029eed79cae1db SHA-256: 025a4111dd393da08418797c4688d1e338b096c6406baab612bf2744fad71586
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm used for phishing or malware distribution. The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/3ccddb1e2aaae8332bf83c7edac85ddf/lojetegufibiw.pdf In PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/34005200661.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/4199268036.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/sezaned.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607807178734b---vosodibapegibisalosoxerol.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/4600f4c82d035fad9bac1b9dd56d9fd8/82082219169.pdfIn PDF document text
    • https://dtd.com.pk/ckfinder/userfiles/files/viritejavexatijokuwekovug.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/31906933335.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/pokekugebewemalidikipoxow.pdfIn PDF document text
    • http://dejede.com/userfiles/file/fevudaj.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/17638939404.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607064dee7612---fipozeto.pdfIn PDF document text
    • https://sealskinz.ru/files/file/worazi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e6b33bfb4---2009870880.pdfIn PDF document text
    • http://oishisushigd.com/uploads/files/54875994437.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/1dt4ih7ng11kpv7bfvt5ui0d15/22895756189.pdfIn PDF document text
    • http://sisparts.pl/zdjecia/fck/file/rewiwalotirik.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/32337007932.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/17a2322f5761051cd5b258d77feb7224/kunoginogepunawaki.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/76441266039.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/067fcdfa30a09d7618bc8fc35aa8b4ff/86374583638.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160d9cdff3cc4a---kikivofuduxapejewiwu.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/mikikopuwatogomisodavo.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/loditumozenagu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+repair+jbl+flip+3+charging+portPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/1d014eda93611042e7e83e2d417eb4dd/77108007758.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_off0000ef5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5E 16804 bytes
SHA-256: 158951ab5696737778696ec5a3690d9ea6fa10657dca7e003d265385d5dc0a80
font_01_sfnt_off00011b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1A 11112 bytes
SHA-256: 8fff669735a79c9e10433ec9bd98ce1681536c08901a2e43c330d460c653a1a0
font_02_sfnt_off000134b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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