Malicious PDF — malware analysis report

Static analysis result for SHA-256 e15cb03d62842faf…

MALICIOUS

PDF

87.2 KB Created: 2021-08-14 21:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9246e57e9a4b92226ebf137801429b2b SHA-1: c3695a70077d4f46a52c17af90b76436834f5063 SHA-256: e15cb03d62842faff99c268f1248fba9fef0de38d8b077dfe058bf798dd0f7c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. The embedded URLs suggest a phishing or malware distribution lure, likely attempting to trick users into downloading further malicious content or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://queure.ru/uplcv?utm_term=genetics+test+answer+key+pdf PDF link annotation
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0280934572---wapufotokunujefi.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cabb876fb6---38523612868.pdfIn PDF document text
    • http://bbhshipyard.com/userfiles/file/sikukirokobebuloribi.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747b966a15f---36254470841.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/f9e25425bd020fd556240da25f19bfb5/gejipafizal.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160823ea449482---22389948483.pdfIn PDF document text
    • https://areicon.com/images/file/69719210011.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160faad2a96231---kogaw.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f111465887d---87426903648.pdfIn PDF document text
    • http://vasset.bg/userfiles/file/fuxeg.pdfIn PDF document text
    • https://parkettworld.com/upload/files/sifefugever.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/96604083374.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/nifadosoti.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/facc77add6493d1031ac806fac9efaa0/55176378603.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/64745105602.pdfIn PDF document text
    • http://santeh.md/img/files/kowipez.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/337105246.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/s785lv3kdfv7ska4lf6o4n6p4d/kaxebupuzobefe.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/gelekebemeniduwuxibezoxod.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/975635052ae44db6e9f9d7852b16255c/zagat.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/27674718856.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982ea861fdd---dilavexafewigomaj.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/fuzaxaxevotuza.pdfIn PDF document text
    • http://cnmrobotics.com/files/files/17834806746.pdfIn PDF document text
    • https://aneri12.cz/res/file/luzute.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_off0000f212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF212 16796 bytes
SHA-256: fdc04600d190fb6ac6b9e8c1067a91f4747da22ee6ba2f2f042f8cc03af8c485
font_01_sfnt_off00011dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCE 10776 bytes
SHA-256: f2dacb2d8d9913ee08f2fb16363fa4566ca242178277fc14523815cf54145ffe
font_02_sfnt_off000136e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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