Malicious PDF — malware analysis report

Static analysis result for SHA-256 447115811862eabe…

MALICIOUS

PDF

88.3 KB Created: 2021-09-16 02:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 44cc061e3bcad0ec82ba280ed0a30997 SHA-1: 7ce6b9701a116646b5bab383e79c754467bbbda5 SHA-256: 447115811862eabebdb28895176ff6e09ff8d09bea503966f77e7151fb882300
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to compromised websites and disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://ketchas.ru/uplcv?utm_term=lucifer+graphic+novel+pdf PDF link annotation
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/26714153211.pdfIn PDF document text
    • http://kajo-frings.de/userfiles/file/16939999058.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/161427aae20241---50619226854.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b4e50b0d4---lonozatanomovemuguki.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/965c5a779dfbd5e9191a3452497b1e91/21228064187.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89300548651.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8cde2a380---67016682180.pdfIn PDF document text
    • https://calienglish.com/ckfinder/images_store/files/xigafuwojeritefusoneju.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613daf7b50157---sadesurijobubadiwajun.pdfIn PDF document text
    • http://xn--80adic7alej3d.xn--p1ai/userfiles/file/pimepinazediwuvuda.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e58f02d56d---vekoberutileb.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/54646404901.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/bb5a8836c6e785ea83bcd04a7ad98e6c/57893499553.pdfIn PDF document text
    • http://gmtshipping.com/attachment/file/negad.pdfIn PDF document text
    • http://i-akparat.kz/ckfinder/userfiles/files/lunopareladadevetuwiper.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/90fe10811e80c9eede8b9bb58d0a5c5a/35633820629.pdfIn PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/befux.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/3e83fc98b85b724b439675b730f8e574/roduroseve.pdfIn PDF document text
    • http://apothepharma.com/upload/files/fisif.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/65747316684.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/25996270992.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_off0000f465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF465 18052 bytes
SHA-256: 48c69bd70d860e6489ad18a222a17bfdf23b14471f43de065125b6c71c853c89
font_01_sfnt_off00012337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12337 10756 bytes
SHA-256: e98dc83b18d7091ca9a0337291c52337af4d1ba818247066da9a7d4f2eff0cf8
font_02_sfnt_off00013ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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