Malicious PDF — malware analysis report

Static analysis result for SHA-256 206c3a37b05f1e20…

MALICIOUS

PDF

83.4 KB Created: 2021-07-21 17:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 242c9d6111ee57980eea3110a4c40e15 SHA-1: 8f1ef4feb91cb661ac0e1c74a051537c97ddf1c8 SHA-256: 206c3a37b05f1e2040e0d2e20f4125b5f64623c05ab2aaa5fabe67255bd1d02f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://itacademyindia.com/ckfinder/userfiles/files/xerozunilizusabevadimu.pdf In PDF document text
    • http://lesen-und-schenken.de/userfiles/files/taxidutariwukebivesitajoz.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/d66vkiphkqjb2pau38560clv5g/bupurizat.pdfIn PDF document text
    • http://crystalsteakandstogie.com/clients/1/1d/1dbb6d5698303b6304ae84622e226a19/File/59057360258.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/946s6dasm79g2eoddvini7o9h0/golatilafumerevofibigo.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/6011246410.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/3a754e62a2975e0d0a8c62ad64f05ca5/81152697166.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715b4ce92ae---39937255741.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/pibubibuwenekiwus.pdfIn PDF document text
    • http://funperm.ru/content/file/xajeninixadogejizujo.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/levinojavaweletawedamozin.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/l7d1lpj5gqkd5r5bfcjum01k1e/69503373532.pdfIn PDF document text
    • http://www.scea.edu.mn/ckfinder/userfiles/files/mepusipitiponigepijofa.pdfIn PDF document text
    • http://nsck-cykelmotion.dk/ckfinder/userfiles/files/vufubuz.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/a48fdcfc118a6807b2e488198d40c7e7/32379251274.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/a36bd2d86a5025db9d637b478fbf0f9d/rulapogivoviji.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/9a59755b7ff23ae8c5f77abdebbb57fb/tefuxijibizeminorajikolo.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b3d3574d3---pofaxituzodewolik.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2aa5c528b---fawukuxudolokukefoj.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/395a8f7438c8ae560b3a5e20ac1bb2af/11609419626.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/bekasasar.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/93d30b39f03654e2f652903023254514/11565289896.pdfIn PDF document text
    • http://bjjiffy.com/upload/22295898169.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad682c71c8c---67495934533.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=graph+with+x+and+y+axis+labeledPDF 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_off0000e0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF904 17144 bytes
SHA-256: 7b1e7db1c626d838833246d7b06620d6f261acc189ba14d4119dcc00ac6069cd
font_02_sfnt_off0001257d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257D 10852 bytes
SHA-256: 650c3651c85582f9716a6750405ff36f4b56ffa877d92e47df6ecdf3a367da45