Malicious PDF — malware analysis report

Static analysis result for SHA-256 580e938ad56b67ac…

MALICIOUS

PDF

67.0 KB Created: 2021-09-19 06:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 174b11c549f01ba5a9bd143c5c173dee SHA-1: f6a1628b429163e5198f8f1bb3852ecf3e1a1fd7 SHA-256: 580e938ad56b67ac66b81d91e8a809930bc714f615412c63008e2169aa95b367
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to potentially malicious sites. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8294

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://j-club.eu/userfiles/file/ladeg.pdf In PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe858f0b01---getexufiwogekirageg.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/boruvasukiguwak.pdfIn PDF document text
    • http://nawoo.net/userData/board/file/2834205101.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/gavekiwukamoseroji.pdfIn PDF document text
    • http://niktid.ru/userfiles/file/dilarikufaratenu.pdfIn PDF document text
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wokelekojomudupajivogowi.pdfIn PDF document text
    • https://dortmundpools.com/contents/files/27825502476.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/zovenozakedanodekug.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/92590096723.pdfIn PDF document text
    • http://mudrberanova.cz/userfiles/file/takaz.pdfIn PDF document text
    • http://blccy.com/userfiles/files/59444794606.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/jowaveluxemojesodilarik.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/65786309303.pdfIn PDF document text
    • http://cw-cut.com/uploads/file/204544069.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161301ca5d2aa4---nezesiwosekubuze.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/161433fae4b1cb---4980873843.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/xunezevesososonibovojo.pdfIn PDF document text
    • http://unitez.net/images/newtech/files/zapojas.pdfIn PDF document text
    • http://baocaosuhoatoc.com/luutru/files/23740300460.pdfIn PDF document text
    • http://baovevietnam-vnss.com/upload/file/wuruw.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/b636725dd8fa5479dafaddc96a0ee626/tabenikipatekemunokowape.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/9548237667.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/22136401644.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=embedded+linux+primer+2nd+edition+pdf+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE6 11024 bytes
SHA-256: cb4a2f32743e572cb1f1b004e73ac689f4f0a0bb775758ace5ea251420a803b6

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