Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf6823781ab8e13…

MALICIOUS

PDF

79.9 KB Created: 2021-07-04 07:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 4e2a4db46f473fb2faa6238186878825 SHA-1: 6e643eb4843aac626b30559e5ed6aa3a6a0c4e26 SHA-256: ccf6823781ab8e135c22f771a3474fbf14e01a5140501fa557b5fe8413e01020
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://nomylo.ru/uplcv?utm_term=neither+man+nor+woman+the+hijras+of+india PDF link annotation
    • https://debcopharma.com/userfiles/file/vizarirokid.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/8cfa628cc3bc36d22c390103b71f00c9/fusonuviwaja.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d239a703532---53200321623.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a87f1edbfb---jibalevawifibokaxomoter.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfa80898e1---pifazafo.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089793c4ce5f---86216067473.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c7dd060d1.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/pt0o3em1s5qgtq1qj1p8eiukc0/22252805548.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/sikibubev.pdfIn PDF document text
    • http://mopron.ru/upload/files/joratosorozevokalofuxikob.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/7032f1a43a29584b621e2f310d1af917/27225512905.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/funef.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/zivulajajavovokuriwal.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0406934001620347523.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/61009831456.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/67651219262.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096d8d395458---fepoxufuf.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160acf90677283---19123756175.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/d6f0386c6e93e41ea920e9a93bfea809/zilonutimonebugesusa.pdfIn PDF document text
    • http://cycling-software.com/files/file/dowat.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/jpm7fb27ait81sd6im55ucujj4/rawesewodutikenawomuxuf.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/tumag.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/kises.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_off0000d2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D5 17904 bytes
SHA-256: 2942ffe11efb7f83d40449b232a032c0c3b3873d6fea094c483c0b6f13a9b4e6
font_01_sfnt_off00010136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10136 10764 bytes
SHA-256: d0ca393b83e35db56cec26b9c7162652193348407af1936ca646617df25f0133
font_02_sfnt_off000119da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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