Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca47c2dff226f3ce…

MALICIOUS

PDF

89.2 KB Created: 2021-07-16 22:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 7841e157252a44953d1bcef22496b00e SHA-1: 330bcf4064638fb22915ec5daf7c313a50351ca5 SHA-256: ca47c2dff226f3ce06d6626c8ec2f3d8394263d752204fa6cca266d35b536f19
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm directing to multiple compromised CMS upload directories and disposable domains, as indicated by heuristics like PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM. The ML classifier and ClamAV also flagged this PDF as malicious, suggesting it's part of a phishing or SEO spam campaign. No scripts were extracted, but the primary attack pattern involves luring users to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.heksan.com.pl/file/luwepodapurapufolesuf.pdf In PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/8epg8l7q53vhhol3c5gn2ltf1h/71073300438.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/gofigejozabagalejo.pdfIn PDF document text
    • https://sealskinz.ru/files/file/wabegol.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/60668868551.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0620f6d2f1---roxesonudigadikule.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076bd49ed703---42992405399.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/minisazezesajivudim.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac7177c672---79372519256.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/funimekizagoxakexa.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/2b281db86d96954c1b213d85f74daaa4/tiduviju.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afda4378ed9---59728497727.pdfIn PDF document text
    • https://nadamasristorante.it/file/xugavelejiwixige.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/sedapinejapewuzuzo.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d83e1029d---dojeduwavojofutuf.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf31f58143---57568104779.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160944c95c1001---dujopatufemujaremaxibexek.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdef22b47d---31943153531.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099522786420---82209720900.pdfIn PDF document text
    • http://lnshiyue.com/userfiles/file/20210530055625_1515540049.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/18644807396.pdfIn PDF document text
    • http://nhs1966reunion.com/clients/1/1c/1ca8f1639ee69cd7806809ed3bcda9bb/File/nawitalefalixulikafib.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20a567f438---vofoko.pdfIn PDF document text
    • https://pomacanthe-art.fr/imagebeforeafter/files/metenuzavavafeki.pdfIn PDF document text
    • https://marosme.ro/hirek/file/87250319604.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/gokadupo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=what+are+pantyhose+made+ofPDF 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_off0000f9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AC 17164 bytes
SHA-256: 5f3a3d324f70008cc8da32687b7b7c12e49bebba3861622da5c19c4b79c502ee
font_01_sfnt_off00012681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12681 10732 bytes
SHA-256: d5f9cde5d0319a89ab7b8039c8639c9f65ce153305e643fde464db2572d143c6
font_02_sfnt_off00013f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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