Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0147d197e63e48a…

MALICIOUS

PDF

83.4 KB Created: 2021-08-19 01:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 33d028e2f6c962ccd7d3f189cdc4734b SHA-1: c6bfed89b238427edd1f6049f6a6d2e91d4da918 SHA-256: e0147d197e63e48a91acee8b4b3235329c3b0c2ab2775723767f2a44c7cfd7cd
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites, and is structured as a link farm. The URLs likely lead to phishing sites or further malware downloads, as suggested by the 'utm_term' parameter in one URL which indicates a search for activation codes.

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://philabc.ru/uplcv?utm_term=autocad+2013+activation+code+generator+x+force PDF link annotation
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160df6300e31be---rijojaxowinog.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a16776ab741---mexidituvox.pdfIn PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/3280199464.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607371e89bce3---24683856815.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/47043722656.pdfIn PDF document text
    • http://nnrhc.com/clients/9/98/980d61ede38c9a35fe3396fb65651545/File/jexubujus.pdfIn PDF document text
    • https://tavio.ru/files/file/81383642372.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/f5e9f1c26115387892a984afc7189586/75715169655.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/dbc12d8960169dabdef6352c5b332940/75747297402.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/86662739087.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d04ba5f95---bugazinawumofavi.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160abdfeaea257---95863784078.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbad261246---povaguwewerotos.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/2a2d6b171c106d0cafa7b3f72444dcdc/36655046888.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/gudasilusewo.pdfIn PDF document text
    • http://rafaelokazakov.com/file/42082927682.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/51255031693.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/9856142657.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/07/files/210720005720.pdfIn PDF document text
    • http://vdi.vn/userfiles/file/betanalakarizado.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/jabejodigiluxevaw.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/25938253166.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/46a840e5603034de4222a2737b650e1c/numutegisal.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/9n96892k2uehhvbo6ggdij5f51/bafozosogube.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_off0000e014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE014 11152 bytes
SHA-256: 83b53becf909ffe957425da6bc99e39114bc5bdc5752eb20a5dd8beb1a94ffb5
font_01_sfnt_off0000fa49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001125b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125B 17528 bytes
SHA-256: e2984dbbaf779459333621161c430a6eaddfcc71fb1a66b899e887089da20044

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