Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8eb44a04a4d8d32…

MALICIOUS

PDF

83.8 KB Created: 2021-09-01 16:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e4cbedd662d81c4bcfedbb197917c83a SHA-1: c7eee3786d69ee2f07a23cd371aafc6cffb3d825 SHA-256: c8eb44a04a4d8d32b679843696ed33fba513895f201df8fcc6fbd4e116b22f7b
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier with high confidence. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to potentially compromised or disposable hosting domains. These links are likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://richmediahouse.com/admin/uploads/file/50837351936.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096d72473573---ruburozafuvajunexagedimij.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/pevobijaduvom.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/zodawoninasotisirokozaj.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/5df13cd3db4a68b2465b0f822e49fa93/kovofonagokaloj.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b0d73087e2ae5e348dbc41ba979b4b7a/wupanud.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/jixuwasegof.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/fufobofabu.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/28876181473.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873d7399109---35266710521.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/32448855065.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/gemaginixitov.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/9373531147.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/nuterewupunopoxose.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2c007d7ef---luxamatolavapinevurur.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/9e3a52cc46a4704630266bd82cd6b774/18366304561.pdfIn PDF document text
    • https://empresa-venta.hr/files/98058052731.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b6aaba433---bewezowedopaxivigewapof.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/1db1d122d3c29a175a94f6790d8ee308/67329247839.pdfIn PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/xafivawiwozulewurol.pdfIn PDF document text
    • https://performanshost.com/calisma2/files/uploads/39810685681.pdfIn PDF document text
    • http://ashioke.com/images/library/File/tafalujijuxijojamebufetov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=hope+your+weekend+is+going+wellPDF link annotation
    • https://www.posluh.hr/ckfinder/userfiles/files/dumodojak.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_off0000e33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33C 10688 bytes
SHA-256: 85eb8ee5fb8ecceaaa28d5d5974f9bfb13eacd0bc03f4ed0df58e3b3eab96f93
font_01_sfnt_off0000fb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9C 17292 bytes
SHA-256: a1e1d66583874f25d8fdba08d14a5155257d3ae58fd53182d138eb1ee3163d0b
font_02_sfnt_off000128a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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