Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d474ce65c66d096…

MALICIOUS

PDF

89.7 KB Created: 2021-09-13 11:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 134e80ad844cb4e43d545a369ea4a07e SHA-1: f82662ecb61eafe52ae357db0955543eb5a75bfd SHA-256: 2d474ce65c66d09698e550ae3a3eb232c47237b685f499f790a07f98f140ea67
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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 http://doradcyprawni.com/images/pliki/wuvebonugiga.pdf In PDF document text
    • http://wx-test.com/upload/ckimg/files/202109060045267992.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/80631459184.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16137d36ee0b84---96058110976.pdfIn PDF document text
    • http://hmsendo.pl/uploads/editor/file/vegalas.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/ribirumoxoketete.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139beffacfbc---9173015657.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16130b6183dee2---63234856992.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/zozusavelogafolizonedel.pdfIn PDF document text
    • http://turksebruiloften.nl/userfiles/file/soziwi.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/reroril.pdfIn PDF document text
    • https://datenglagi.com/contents/files/97650693588.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/45215959742.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/37908337476.pdfIn PDF document text
    • http://cold.lt/userfiles/file/88476731580.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/21778155020.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/26041759056.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e625fafb93---94554599214.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/35459500382.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/tavipuwo.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/161363a688ec7e---difibapuzonazovi.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/pizefetanexiv.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/49055735231.pdfIn PDF document text
    • http://embody.box8websites.com/ckfinder/userfiles/files/61036951471.pdfIn PDF document text
    • https://wrd13.com/force/file/27656450560.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58462316297.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=eeswaran+tamil+movie+watch+onlinePDF 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_off0000fba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA4 17596 bytes
SHA-256: a059019ab4ebe163b1a2327ce0d86c163f9d2e6a1536803f89c2066b527955e8
font_01_sfnt_off000128da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DA 10628 bytes
SHA-256: 0197afddb34160bfe1611c50270d74c7f8da4672103a2d7fc652d0723ef7915f
font_02_sfnt_off0001410b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1410B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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