Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e14e2edfff5466…

MALICIOUS

PDF

71.2 KB Created: 2021-09-26 01:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: f60854bb75d46058282a44d04bfdf260 SHA-1: 1782b0f030bd8c5d8dc14e982ad3d715b2ce1615 SHA-256: e2e14e2edfff5466eca5c7efdac5b9d5bc3cf90e876fd0b7573eecfd575db709
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious destinations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the primary attack pattern involves luring users to external sites via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://smidgel.ru/uplcv?utm_term=download+rush+rally+3 PDF link annotation
    • http://studio5r.com/userfiles/files/tezewavisojo.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/lubalebediki.pdfIn PDF document text
    • http://hardiebase.com/uploads/assets/filefile/kagoxawusizesizagovi.pdfIn PDF document text
    • https://jetaime-shop.com/files/zugidujipodew.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/kabinufivip.pdfIn PDF document text
    • https://jotekonybakterium.hu/userfiles/files/25151834171.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/patenavopisug.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614138bbb2454---39440380369.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/bavepum.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/6664844136.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/vofazutelelajivogazoriwem.pdfIn PDF document text
    • http://tcihk.com/userfiles/budinazanim.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16141f0d812f13---33596624013.pdfIn PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/dobarupimidi.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146850111332---95312227412.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/dufamisazebebopijadojalib.pdfIn PDF document text
    • https://marupyara.com/fotos/userfiles/file/95353448336.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/76588550962.pdfIn PDF document text
    • http://bancodevida.com/bancodevida/admin/images/image/file/fivuv.pdfIn PDF document text
    • https://giasidaily.com/uploads/userfiles/file/48831287332.pdfIn PDF document text
    • http://bananamusic.tw/uploads/files/202109030827344602.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/98564754077.pdfIn PDF document text
    • https://eventaipei.com/upload/files/86859764398.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_off0000b3c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C6 10496 bytes
SHA-256: b12147d65a4f125bdf76e4dd1ed6b5e1bd456dc2a9c4be230cef827230832df7
font_01_sfnt_off0000cbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAB 17080 bytes
SHA-256: 9e63cf9ae6666392b94944d2d0f33ae9525092651395340e31fc157c97f1adcc
font_02_sfnt_off0000f73c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1