Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d1e85392ddb4b5…

MALICIOUS

PDF

188.1 KB Created: 2021-09-04 00:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9f27abe10b08093b5063301ee2e3d4de SHA-1: 6126f79561295fceb33a1f35ce76d7ac62b0e749 SHA-256: 15d1e85392ddb4b5e1cc62ee4a3d80fb5f26953e40828f47c713e94628cc599b
154 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristic analysis revealed that the PDF acts as a link farm, directing users to multiple compromised websites and potentially disposable hosting. The embedded URLs suggest an attempt to lure users to external sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5861

Heuristics 5

  • 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
  • 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=interpreting+graphics+taxonomy+worksheet+answer+key PDF link annotation
    • http://studiobaliva.eu/userfiles/files/54437111098.pdfIn PDF document text
    • http://dentherapia.hu/files/file/49135522379.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/xipepejulalatuligadif.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/vopojola.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/fibawatimukidi.pdfIn PDF document text
    • http://zoldjogsi.hu/uploads/files/kezetol.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/lelovituta.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b10e715acf---22885798347.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/xoleluvidobebeva.pdfIn PDF document text
    • https://coebmsf.com/userfiles/file/rimowejutut.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/3da66a7c696394071b362069ecb29665/fovapekisubobome.pdfIn PDF document text
    • https://avela.md/userfiles/file/jokepo.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/dabiseleweruxodagokudidoz.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ee9725e71---18639491482.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/cad2c2e482341eb529db1714bb6a4064/61938744770.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/bomixigilazepem.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/4093647945.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/060415112614.pdfIn PDF document text
    • http://bannermaul.com/userData/board/file/57555435143.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/cde3b585dc046f9564ede6a3a4ff96b9/wemubopivivixiritopij.pdfIn PDF document text
    • http://gfzgt.ch/upload/file/kabemedamigexofanakep.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/53293367826.pdfIn PDF document text
    • https://alutat.com/data/file/mexozenemifudurakar.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/6100705460.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00029527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29527 19748 bytes
SHA-256: 8954c6898633faa1ac5513968564df49cbf36aa5375177c8a03c7b9c0f6018be
font_01_sfnt_off0002c88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C88A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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