Malicious PDF — malware analysis report

Static analysis result for SHA-256 225ae68f28675b7b…

MALICIOUS

PDF

87.5 KB Created: 2021-07-24 09:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 24808aba36d3ac010e05c60972efe55f SHA-1: bcb2d954b178beaf7fc40b61b2942030d6b71472 SHA-256: 225ae68f28675b7b8c2a00f6618f6de6bb6ed899d1e6b0764cc3ac06c63bca5f
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to numerous URLs, many hosted on compromised CMS uploads and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://orkoien.com/userfiles/files/kojupoxaxiko.pdf In PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160757b1f330f2---2310413096.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aea2cfacf47---temibirexeton.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b574e226c88---lovasulonusepanagiximatu.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0cfd5f9e4---pilalapip.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607054361d373---58366371650.pdfIn PDF document text
    • http://ave-france.com/pics/files/44351386214.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/15483892370.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/eefbe1fd2d6042f26e73889c8e4d17b0/xeberabelomo.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16099edbbb4974---wutimapavotewirezot.pdfIn PDF document text
    • https://travelone.ae/userfiles/files/zupituradusirar.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/73h2kgtladko6leohjrgt2kn19/lopoxareru.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/6577405553.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/u5cek3b4l0hbcuas5tlpmaj0jc/42119048206.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/rutalujiwusafa.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608477921cf09---dowarero.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608110c5c9443---jokadagenamig.pdfIn PDF document text
    • http://cl-pub.com/files/files/boriwutegovusedafefuxewe.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8fa4d15ba6---jiwajabuvezifukifonepoxe.pdfIn PDF document text
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/83871838875.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/67680310019.pdfIn PDF document text
    • https://bhandarisurgical.com/ckfinder/userfiles/files/45619006107.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/toramegolemubi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=what+is+the+best+android+video+chat+appPDF link annotation
    • 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_off0000f3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC4 10764 bytes
SHA-256: 5f1c1fa6ccf925a8c5948fa1869006f595f4927e4413b3fde0b13923c1fc6b64
font_02_sfnt_off0001244a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244A 16976 bytes
SHA-256: d7c680fe97d3c822dffeb518a1dd1f6c572266e1cb4edf9d4e6f7303e70a9155