Malicious PDF — malware analysis report

Static analysis result for SHA-256 214ab5ad9389e27e…

MALICIOUS

PDF

81.1 KB Created: 2021-09-06 00:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c6786458b654dfea4c84fdf4e3464692 SHA-1: 1c432716b8a2e098dd2148372e5b8c364b76d01f SHA-256: 214ab5ad9389e27e317b2a0bfab4b1c26947e060123bf1f1b14249583d699e40
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure and URL heuristics point to a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://webinaris.training/ckfinder/userfiles/publics/files/puxivagafitile.pdf In PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/86371451675.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2b8e868c3---puwebafujekakadoliba.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/nupebowozasesolufosijib.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/87028420086.pdfIn PDF document text
    • https://12tiga.com/contents//files/23808826471.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/xebemum.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/zogeforus.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/16312031263.pdfIn PDF document text
    • https://blogsma.com/files/pukotivobekipagexaf.pdfIn PDF document text
    • http://vilniausgreziniai.lt/userfiles/file/gojobokupituba.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/7672e38aca059b48075fb0e0db6afda4/66013647906.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/3d17569d416209e44a9ed914b592e247/17933078840.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809d0ac27fe---pafoxidimawub.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090c5052c587---20490403224.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/57429484443.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/kavuwagasufapa.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/kamejusolalilabijopudonid.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/xeraniwobenasixufinaf.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/142887a198f7f4dd563013fde44c3c20/majuganakuzumibe.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/39805481445.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/k8qln1kno929h8k9tksqkh1tvs/wiveditufireraka.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab72f2b8a3e---73414126115.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=witchfire+trilogy+pdfPDF 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_off0000d953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD953 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF165 17352 bytes
SHA-256: f16839846738f33eb678f98bf1e36644fce26bb84839c06e16920e51587ead26
font_02_sfnt_off00011e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E96 10572 bytes
SHA-256: f177250514f8b2a5d07bd84aba52a24e6b646b9bc2b8cffc43168843329ebbad

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