Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d408f7c7909240…

MALICIOUS

PDF

79.0 KB Created: 2021-10-10 04:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: fe755d73a1e05f0c91d53ff5d67ac02c SHA-1: 2bd8af624e8541eccc276f90bf729314cb558775 SHA-256: 80d408f7c7909240e1b21a119156eb32dc75104ae4042f5760ca4ad59ae12e4c
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites. These findings suggest the PDF acts as a link farm, directing users to potentially malicious content or phishing pages. The presence of multiple external URIs and compromised CMS upload links indicates a deliberate effort to distribute or host malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4058

Heuristics 5

  • 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
  • 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://wastran.ru/uplcv?utm_term=diatomaceous+earth+in+the+vegetable+garden PDF link annotation
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615df6ce99fed---panuziponorepoxes.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/ralujejenedumabebexolusu.pdfIn PDF document text
    • http://first-group.kr/ckupload/files/tumunekepi.pdfIn PDF document text
    • https://lanjutpt1.com/contents/files/55218975440.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1615b4879351d4---38603017495.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/89305508010.pdfIn PDF document text
    • http://asacnfservices.com/ckfinder/userfiles/files/dewajexogopazisaro.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/pomuvilinuvon.pdfIn PDF document text
    • http://studiozoppini.com/userfiles/files/pidonezilopikoradizo.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16151bf4485cb7---49821354574.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/bemesatuluripoge.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/60004987282.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/91048288585.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/76930629616.pdfIn PDF document text
    • http://mitroc.com/userfiles/file/65005698709.pdfIn PDF document text
    • https://spotiverify.com/ci/userfiles/files/52298656565.pdfIn PDF document text
    • https://cfaegaianascente.pt/portal/userfiles/files/seben.pdfIn PDF document text
    • http://vino-charlie.cz/userfiles/file/68834659940.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/7160a77a51932cdbe885dd3129d1414e/69035976243.pdfIn PDF document text
    • https://ciiinnovationsummit.com/ci/userfiles/files/74391632861.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/96528446995.pdfIn PDF document text
    • http://hengtongblower.com/d/files/bujigaredajatotevuxo.pdfIn PDF document text
    • https://centrumschoolka.pl/photos/file/tuzowapozomuvoxowon.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001059a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059A 11124 bytes
SHA-256: 40e615d127de9923bf56e44ab52d2d4ebb3fdcac1f9f91586104a52da17cff12

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