Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e1a3ec7fbae9c8…

MALICIOUS

PDF

67.0 KB Created: 2021-08-25 03:25:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 259e9cf1e26246af4ed34fd32d7540ca SHA-1: d54c3f37f3b8c8c30095dd64c0a66e2f6d26a39b SHA-256: d3e1a3ec7fbae9c823ba8e440376b9ea17fe2cde68ee0f8d061828c5fc82b5b6
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised CMS upload directories, a common technique for hosting and distributing malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure suggests it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6664

Heuristics 5

  • 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
  • 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://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c55acad40---bafukekozitexatiwifevo.pdf In PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161030b8ba3c72---rezuruxodojepavoz.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/51eea4de8d282ad75bfb32eb3bab9c37/kizowomiwag.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/064b2a3dc8945aeb3a8991de5bced601/48350616438.pdfIn PDF document text
    • http://christopherdallo.com/file/buzuvinude.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/od0gcnmdjqsjkcrd8ggabcpulg/kiligosixoruvurawetevolux.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/rivogumoxasonopopuzijobox.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/38485187979.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/85069393265.pdfIn PDF document text
    • https://jphotographyllc.com/userfiles/file/95626275091.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/63149961973.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/dfc362a303474418eb0de0cbbefe6666/12220088377.pdfIn PDF document text
    • http://xn--9w3b11kh5l.com/ckupload/files/43958985478.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/ruxegijatazebaf.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/c62d7f214765f315cae09dc1ab7fea7c/gepesaxizagerunuk.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca12c407b1---67135662437.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/50840679692.pdfIn PDF document text
    • http://softtox.pl/new/userfiles/file/14532937473.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7754282961---lamoxazanewi.pdfIn PDF document text
    • http://djapm.com/userfiles/file/nurinepijas.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f092700f17d---pezobamumeb.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/busikanadixogep.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/kiwazemirusejugibexavapan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=country+gospel+music+praise+and+worshipPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC9F 11292 bytes
SHA-256: 214412ea1a0749508392f86d10dc49126f4c1594de9172f74927818675666e3b
font_01_sfnt_off0000e6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DA 16500 bytes
SHA-256: 3eeafd389433bc11e005799af7d10847e84b260914ab5ee400ae06687b45f692

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