Malicious PDF — malware analysis report

Static analysis result for SHA-256 e37657909006c6c4…

MALICIOUS

PDF

85.6 KB Created: 2021-09-06 06:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: fd08dba78dae6612db9c2343503e9c1d SHA-1: 5003df74472b1697c2ef9e354ea1e53096b66a4b SHA-256: e37657909006c6c4178d6bf69475672e8537ee3e9648888b6ebc66ae6b016c61
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary function appears to be redirecting users through a series of links, potentially to a malicious site or to inflate traffic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://studiotecnicopetrillo.eu/userfiles/files/91573137584.pdf In PDF document text
    • http://hanilkwanla.com/uploads/files/wemebulapototinegam.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/27634901216.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/49554466721.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a01e5eb2ccb---juretidefagimosuk.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/muxaxofujisut.pdfIn PDF document text
    • https://lifesmart.lifesmart.ro/ckfinder/userfiles/files/26363401461.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b14a161e0f3---fogelikunifaxisuxulisu.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/miturajetasex.pdfIn PDF document text
    • https://derfo.info/resimler/files/17449380044.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/ximeneginez.pdfIn PDF document text
    • http://sourceit.ke/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/94756835230.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/39035658505.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/161275ba6bf65a---fafojerabuvuzofe.pdfIn PDF document text
    • https://penal-garazh.ru/files/tonuteregaruwobonedez.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/21227772919.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097955e5a879---11792051210.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/vuvidupeponegedot.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608668de57e85---tamil.pdfIn PDF document text
    • http://vinmexindia.com/uploads/zobavure.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610eebc2ceef4---vorageriba.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e83322dea---90008520343.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160929c0caaca5---goximokitazirelufazujer.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29df44f561---vawegofosor.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b72e7723ede---707801389.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=oracle+rdbms+concepts+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_off0000eb0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001031f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031F 17164 bytes
SHA-256: d777a8b786762e2b43a9cdf3cde1a03466d656bbac45a41a09d6dfa7b6c85b1f
font_02_sfnt_off00012fa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA3 10852 bytes
SHA-256: 862a78d60acedffec6698563868b056db817ceffd730986c88e3dd8c181dae6a

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