Malicious PDF — malware analysis report

Static analysis result for SHA-256 9416c44c588be604…

MALICIOUS

PDF

83.6 KB Created: 2021-09-06 02:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8a787d872bf5fd3592354a49b8dba448 SHA-1: ca20e85411e06cf47356b49d9efaf143b79ede5a SHA-256: 9416c44c588be604121d042da68705a1efe67d72d05b6ff6898b39d7f00f4149
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to numerous URLs, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a phishing or malware distribution scheme. The primary goal appears to be directing users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://garglob.ru/uplcv?utm_term=comment+supprimer+une+page+d%27un+pdf+adobe+reader PDF link annotation
    • http://didaconcept.com/admin/fckeditor/file/30447290473.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/53087441018.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210815_322CF8065F44300B.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079bc60181d4---3582944315.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1608715073937f---bowamumumesizixevozafu.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/nafabuvisudalinegivuro.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160be40cd21f2e---xemisuvo.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a84cb1ec63d---80509100450.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080dfb02b69c---29857928750.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/510bf678b0f25ef5bf2268334cf358f3/pesulolawevanamoseriz.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/70266666494.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075bda65a6c4---pojixumij.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751cf0ec3d5---suseluvavop.pdfIn PDF document text
    • http://dietaltop.com/userfiles/files/26833948445.pdfIn PDF document text
    • https://eurouniversal.eu/ckfinder/userfiles/files/bimuri.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/pufajuwamep.pdfIn PDF document text
    • http://ibrahimalsada.com/pics/file/xoraturujakodup.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/efl5glc05vvbs7q1lumvscmagb/99907625607.pdfIn PDF document text
    • http://vswet.ru/f/72233673239.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/piliso.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/92503990256.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/88293987707.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/lagus.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/2d9f02ac19c2e645403c436f35d0e09c/xatuwagejulite.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_off0000df8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8E 18572 bytes
SHA-256: e02091dfedec282df569598c06c3a272ef844547a644f05682f52889542bed53
font_01_sfnt_off00010e22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12639 11100 bytes
SHA-256: 27370a9f959179452fdc0c4debfcdb62ebdde8e7c7bf1fe75c4298c50b07ae8d

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