Malicious PDF — malware analysis report

Static analysis result for SHA-256 92866ab29c50628d…

MALICIOUS

PDF

88.6 KB Created: 2021-08-01 08:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7e8b4939ed599e2bc9873d615d13f3fb SHA-1: 77d04776e6a3ed3094a03e60c35c5596c75472a2 SHA-256: 92866ab29c50628d1fde3c7733a341dff9cded3a8615e98c219a5110d0e065fa
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting domains, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://chinajessie.com/seadata/data/uploads/img/file/162283576419.pdf In PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/710dedf8aa1f74bc4997b69471319e7d/51684710575.pdfIn PDF document text
    • http://studiotecniconuti.it/userfiles/files/20489708419.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cb756f602---tamixoripemewoxe.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/kajejutemalibaluza.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/7d39l5qafg9khqofrr361et6sh/wusadamajen.pdfIn PDF document text
    • http://ucity69.com/clients/861769/File/29213967047.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609160640636a---nozaranojekogirojo.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/fipidbm17cr47e2mb0noq2at68/67006243491.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/448734a427cb447b9eaeaba600b314cf/litas.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd46dc7563---pofitidafumudawelago.pdfIn PDF document text
    • http://helpibr.org/clients/f/fe/feaff840d005acecac0f151e8679c8db/File/netamiribujodofiwo.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/a685652950b077ce731ee60fe6cb35ae/20962240005.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/tekagasegisures.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/bewegogedisadexapopifuloj.pdfIn PDF document text
    • https://hgb.se/filer/file/8440245319.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cd873af6f---59584060222.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b65d2b3ae---luxadibozepedoburaworif.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/worafipakitadexalujal.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/pialte6u4qmjor4i57a3dkf7ne/risulijubavumuwaruda.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/rivizuzutasulijegasoxob.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210512081219.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/25312485702.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=possessivartikel+akkusativ+%C3%BCbungen+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF99 18788 bytes
SHA-256: 9543986ec8b40e70dca5d78b9dc1705d170df179dc15e28a71775693b0efa13f
font_01_sfnt_off00011fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD9 11264 bytes
SHA-256: a8868e607d936cb53d2d61129a07d167f040480caa1762686235dabb683b9153
font_02_sfnt_off000139ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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