Malicious PDF — malware analysis report

Static analysis result for SHA-256 4628a0926fd9cbec…

MALICIOUS

PDF

85.0 KB Created: 2021-08-25 15:50:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 946d941e89fd9e53bc3adfa6ee78070b SHA-1: 1f790c064b78d078bd72d5d7ec0c3696dcf497ad SHA-256: 4628a0926fd9cbec25b7d291ec64538eff9ff508af97c8f2b766f6649992a27e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to distribute phishing content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://wastran.ru/uplcv?utm_term=fantasy+football+week+4+waiver+wire PDF link annotation
    • https://chrmglobal.com/userfiles/file/26620455685.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/mufidimoduji.pdfIn PDF document text
    • http://learningkey.org/userfiles/89015274748.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/geqao7v16jdoc6pghkvvudbku7/mobipilofuf.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/36539978867.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cb0e6150dad---dupufejadofezavebofugoxi.pdfIn PDF document text
    • http://kasaitogo.com/uploads/files/bokapivanujoputatijafax.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc469332560---pobamagazizakezi.pdfIn PDF document text
    • https://cooperspick.com/files/77435758331.pdfIn PDF document text
    • https://rgcsmt.org/ckfinder/userfiles/files/jodogutejuzukapuw.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/terigezizum.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/ou2n9m15qo20c9duugrj5ujdl1/tadutudafafapekesitesu.pdfIn PDF document text
    • http://eaeocs.com/clients/c/c7/c75ed17bfa54634cfc1039f1b599a7e7/File/13868880316.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/ludedebugapozerorodirit.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/zuxumuded.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/gqdbptub9ppil6gp0rn7gv6s64/58387209537.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/88032489474.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/zopupap.pdfIn PDF document text
    • http://tvkinter.com/file_media/file_image/file/70550392530.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/qhqorad4job660t3fel2qskob0/44939133390.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/kso8nsa22g4ts3k9bv1i37akc3/rifalemabivigimiwejitene.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d245a07f0---33273155134.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/jonozalu.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160809098909f1---nabilunebajolegikuniko.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113f61fbb81b---defizadewasarikigomozik.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/99591449163.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_off0000e720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE720 17564 bytes
SHA-256: 549c494ed828babaa0c9efb2a32d4d62b222b47837bd62da96911b088b274bf3
font_01_sfnt_off000114f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F4 10760 bytes
SHA-256: 05d8e8dd9c55e8830f1e685f85cd6115072ab25cb6874eb5230b2e25421905c9
font_02_sfnt_off00012dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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