Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d1d9d6ce65096ea…

MALICIOUS

PDF

75.2 KB Created: 2021-09-01 06:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 30bad56d0053f60340cf916d6c279c62 SHA-1: 0749329195548fad7f122758f3c38a14def37d4b SHA-256: 6d1d9d6ce65096eafc6e4a0884333946c94f13c6c2bbc63aa90a18817e0d10bc
156 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. It contains numerous embedded URLs that form a link farm, pointing to compromised websites and disposable hosting, a common tactic for phishing or distributing further malware. The heuristic firings specifically highlight the PDF's nature as a link farm on compromised CMS uploads and disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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
  • 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://wastran.ru/uplcv?utm_term=carbon+and+its+compounds+class+10+ncert+pdf PDF link annotation
    • http://ccswcd.com/userfiles/file/82379523648.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5dcc56306---60426179866.pdfIn PDF document text
    • http://musikpark-live.de/userfiles/file/wiwenosimifuk.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/defidudubavutulu.pdfIn PDF document text
    • http://ogbchurch.com/clients/880797/File/42596347408.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/gusesutisori.pdfIn PDF document text
    • http://sourceit.ke/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/93135487158.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1abc5e241---femukekulefavogola.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/pepakigapopirulapuwu.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/5bcbc990db069f9e5cf25b948a14026c/jotusosozasedut.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/74894394262.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/60689042840.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/fopatenosakeropakizedunal.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a525e8bfa96---pepiwavumizu.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/39593851312.pdfIn PDF document text
    • http://logtech.cz/foto/Image/file/31492423582.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/dejakowemufaxunopizasajim.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/40764079382.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-8-13/20210813025146927986.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/wunigefapepoxunis.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3d1fd1046---sanewolise.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/50386370476.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/15547466204.pdfIn PDF document text
    • http://kartinatv.org/uploads/files/86051867955.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_off0000bec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC9 11224 bytes
SHA-256: 30954bea78972ed06db1c881b8c0b8b7e7ce429fef69af3958b9116f8995025e
font_01_sfnt_off0000d8e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FA 17808 bytes
SHA-256: 63a6ab43aa3094ccfa41e731ad647c0df613c11cfb62586d4df540087dff5d66

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