Malicious PDF — malware analysis report

Static analysis result for SHA-256 67bfc32f465ecdf1…

MALICIOUS

PDF

84.8 KB Created: 2021-09-22 21:13:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8ccdcb78b210b4f8100ed3756dea34e9 SHA-1: a594d00857afc319c2baf10a78b5c062073e687f SHA-256: 67bfc32f465ecdf12f9386ef51049f97bdec15ee9437abe58ab7097fb0001e96
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with one specifically identified as a redirector for a search term, suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and external links are consistent with techniques used to redirect users to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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://chcial.ru/uplcv?utm_term=seven+deadly+sins+season+3+watch+online PDF link annotation
    • https://needletherapy.eu/upload/file/wanepejilokazotiposino.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/zoradujorowikijasexiwot.pdfIn PDF document text
    • http://nerezove-kuchyne.cz/UserFiles/File/83777578611.pdfIn PDF document text
    • http://behtarinekhodetbash.com/files/files/36522730347.pdfIn PDF document text
    • https://perkunasstudio.com/uploads/files/202109192243342246.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/jofesugidepivuwogusir.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/84058628746.pdfIn PDF document text
    • https://flims.atelierleuthold.ch/userfiles/files/moxugagekime.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16139077db2db4---29272423486.pdfIn PDF document text
    • http://xn--80akoseq9f.xn--p1ai/userfiles/file/64478693140.pdfIn PDF document text
    • https://fisheaglesafaris.net/pics/user/file/liduzubadazivunopo.pdfIn PDF document text
    • https://lostfoundglobal.com/userfiles/file/vejorotojawurazijosabo.pdfIn PDF document text
    • http://micruts.org/userfiles/file/dumuz.pdfIn PDF document text
    • http://sportsbettingconsultants.net/cote_dor_import/admin/ckfinder/userfiles/files/50187055010.pdfIn PDF document text
    • https://regenerateacademy.com/file/riwino.pdfIn PDF document text
    • http://transbur.ru/admin/ckfinder/userfiles/files/nexinowuzedufuloxejez.pdfIn PDF document text
    • http://thegioimercedes.com/upload/files/siviwavogejolunive.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/rebewep.pdfIn PDF document text
    • http://tradotel-riviera.com/file/togixedobupam.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/76607327207.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/nudovubovatufe.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/92174477057.pdfIn PDF document text
    • http://dsfly.com/uploads/files/wesevupifid.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16143a2e571bab---12878958216.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_off0000e5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C8 18028 bytes
SHA-256: 600e4df3a7c484a54a5d1e2b8cbd803d6b3cae88b3351338263dc59197d5a3d2
font_01_sfnt_off00011465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11465 10880 bytes
SHA-256: a32f7cf0c799276e6fafae07284f31365a8d2a012f10856376e0ba7e2e975842
font_02_sfnt_off00012da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1