Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6db9f752657226…

MALICIOUS

PDF

95.3 KB Created: 2021-07-20 18:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cfa7e77ece7baa97e94157db209ad141 SHA-1: 5e070cf2e2705bfa517ff6b365b0b02b2088b1ac SHA-256: bd6db9f7526572262c20e809f5e8c99a6c03a2c5cbe66ab922e949f7c73e6e9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The presence of ClamAV detection and ML classifier flagging strongly suggests malicious intent. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic point towards an attempt to redirect users to malicious sites, likely involving JavaScript execution within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://ehhs1969.com/clients/6/67/67a0fa02f482ea8575b7cec7429e43a8/File/bonudozadosifevi.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/c6441las9i5a9mdamm69k9ggd0/modipekonekutinusazidowu.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1694a2d3b---watijavijotik.pdf
    • http://perilatomsk.ru/ckfinder/userfiles/files/vesanimo.pdf
    • http://pechati-piter.ru/userfiles/file/99293080322.pdf
    • http://www.golfusa.be/userfiles/files/21264196498.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608764ef49939---67248805866.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/fbe36385fa18921d737e62ea2ccb596d/11777726407.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608bdffa26ed7---51271619687.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16093ded391681---59188313612.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f6dc9584d---luxexiwikadegujik.pdf
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/nabisetewaramuw.pdf
    • https://techson-cctv.com/upload/file/673222755.pdf
    • https://ystechpro.com/nbloom/fckuploads/file/senaxe.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c305ddaebf8---22934988389.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/b0447689e3efbce43348804dda26a90b/38471073076.pdf
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/xuzipowuwiwalod.pdf
    • http://autoscuolecasetta.it/userfiles/files/32769768173.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/91ad90741a2b398507d96832045187b3/zizovuwa.pdf
    • http://abwcoliseum.com/uploads/files/rajarubimeru.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/gvhp44ankn5rhkkq80hhed731a/11454995176.pdf
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc3e01f1f5---fibixopofapize.pdf
    • http://domholidays.com/userfiles/file/xokedibesubuvel.pdf
    • http://apsons.eu/files/file/nobanebafafatoj.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160739c4b66247---99892305005.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/ed46b3e3fc43b3ab6e3acc048aedbd6f/63499228467.pdf
    • http://aucoindeshalles.com/menu/file/zavupufefuto.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=game+of+thrones+season+1+episodes+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f9d.bin
968c6123605f938c0da9c451ba73ca00b13eead1b1b1835e53444106b1499389
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9D 17840 bytes
font_01_sfnt_off00013e50.bin
cda45c14569a601af9f64659e81503b0f0a56012564181a5fb17876248cbbe92
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E50 10940 bytes
font_02_sfnt_off0001579c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1579C 16792 bytes