Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cfd5f9adf8589c2…

MALICIOUS

PDF

70.3 KB Created: 2021-09-05 03:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: eec2e522d917770b86c8f30f3c6c0d90 SHA-1: a3d0020f8ba9fa4723eaa591f69625d980c3eb8f SHA-256: 8cfd5f9adf8589c2c32c84c45291e49d282b7b10fefe06ba645452edeab2ca97
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8257

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 https://pemaboutiquehotel.com/assets/userfiles/files/givijaxudebijuwakezuwonev.pdf In PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72461602ec---2803088251.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/74380556941.pdfIn PDF document text
    • http://hicoweld.com/shop/fck_file/file/67031910993.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/0d23e60aba5e6d692e17ee95cbd87b1b/82447100611.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/89873056298.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134032545890---73478396361.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/64118734531.pdfIn PDF document text
    • http://bsa.by/ckfinder/userfiles/files/88412351696.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac68454ce7---10015155914.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/748361890.pdfIn PDF document text
    • http://clickvay.com/upload/files/xukisizapor.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160847f6a77fb3---73871763221.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/10876115356.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160aacc21c1f34---87719657050.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607efb3c654f6---86795350011.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607735cc406ae---67799862079.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d99e8f6db1b---2240754452.pdfIn PDF document text
    • http://asfus.net/virgsurv/userfiles/file/garawiziridibosozufelif.pdfIn PDF document text
    • http://shreejians.com/userfiles/file/soxupiwekasexumo.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/57048160204.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/9cjigqh03tjgi4hg4peggo1ql5/logubu.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e0ff55f35---1173699815.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=que+es+vinculacion+estrategica+pdfPDF 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_off0000ca88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA88 17600 bytes
SHA-256: 90c2941390f042a8df74fe81d0e96d7b4bd37a4b762be2e43c1a7811da247df3
font_01_sfnt_off0000f608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF608 11020 bytes
SHA-256: 48ae9f68e9047740256c16c4963c5f59cdff5633a5c08679450eaf523cfad97f