Malicious PDF — malware analysis report

Static analysis result for SHA-256 97273da6d8a1f1ac…

MALICIOUS

PDF

95.1 KB Created: 2021-09-05 20:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e9236fdce441e5e703ff07b792209fa9 SHA-1: 7f587bc17e023a85e2fd108867ac6a0ac256be39 SHA-256: 97273da6d8a1f1ac71716a0464ea3947cccd96453b51aed039af69e0fbf91eb1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to domains associated with compromised CMS uploads 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. Although no scripts were explicitly extracted, the nature of the link farm and the presence of external URIs suggest potential for further malicious activity, such as downloading second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chambres-a-la-ferme-plouzelambre.fr/userfiles/file/nuxefimabarolubepodevada.pdf In PDF document text
    • http://project-lovcen.me/userfiles/file/3803199330.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/joxizudivupu.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160903b33738d2---94283920204.pdfIn PDF document text
    • http://leasingtowers.com/ckfinder/userfiles/files/xenisogiguwatetesag.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/34f625f1c337a05101157538d8795ccd/39449827780.pdfIn PDF document text
    • https://valerart.com/ckfinder/userfiles/files/mabivasuf.pdfIn PDF document text
    • https://ikansambel.com/contents//files/penometejiketibuwulebilox.pdfIn PDF document text
    • http://moristas.com/userfiles/files/merizolusazateverarivexe.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16072ae2faf04a---fedefukiwosiwut.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/97382305869.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe304e594d---64406322379.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16077147a3c12e---23589872477.pdfIn PDF document text
    • https://unifor975.ca/userfiles/file/99308050348.pdfIn PDF document text
    • https://www.borzabadi.com/ckfinder/userfiles/files/xenivixosut.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/41545843190.pdfIn PDF document text
    • http://sissonne.hu/editor_up/mogage.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df1cc5d43c---fuvid.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/53269524216.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/3648529a24a8b30274002635dcab6822/68296296688.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/50f6469692219f7eca7e2ce0b28bed26/pubusanefenebadadukibaj.pdfIn PDF document text
    • http://tmtechvn.com/webroot/img/files/filalisu.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/u9ahm3mkr68vrhv4tqen605d9i/88968452939.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=a+distant+mirror+barbara+tuchman+pdfPDF 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_off00010a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A99 10928 bytes
SHA-256: 299105090e1de173fe41f22588e8d32097686c46ff4fe9bcaa376c78a98b47c8
font_01_sfnt_off00012375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12375 19872 bytes
SHA-256: e6b2492aa0a28fd9b80e7489cb54aeb99683c9b10917b7f55c978e2eea7a137f
font_02_sfnt_off000156fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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