Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0cce66bc234e1b7…

MALICIOUS

PDF

78.1 KB Created: 2021-09-16 14:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: d89b3cc649059449a38b5587c0e48814 SHA-1: a2f1c03de47ff4baf79124f66f56725166ca4eb4 SHA-256: c0cce66bc234e1b7ea203e368c0f022b15a4d6189c99bebe2fe8cd02ac03c40f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous external links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

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://oniceh.ru/uplcv?utm_term=youtubers+life+hack+apk PDF link annotation
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/u0ivrilr9qenuo0juhtn05rcs2/nalume.pdfIn PDF document text
    • http://recviem.ru/img/upload/17391515410.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/9666919004.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/fefawazutanasemedasigujex.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/68628905257.pdfIn PDF document text
    • http://aerotechgroup.ru/img/outer/files/39285202404.pdfIn PDF document text
    • https://rhodium.vn/uploads/news_file/pasulisunidetupiwab.pdfIn PDF document text
    • https://calson.garment-pro.com/ckfinder/userfiles/files/60380113249.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/nalejadef.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c96eeb051f---zofeporatorajepoxuxi.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/e40e3bb5464f08d47a8ed226f9e81dc3/biwopivotazosiziwa.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/dekowe.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6bedae2c2---newujenofopom.pdfIn PDF document text
    • http://agro-partner.com/Image/files/76866692371.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd17c7704a---tarakegijoweli.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/cb32912582e9f0eacd244c6d8878d8b4/mijimebam.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/81178331947.pdfIn PDF document text
    • http://goldenagegroup.vip/userfiles/file/55024884075.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021090603461813.pdfIn PDF document text
    • https://sopkambing.com/contents/files/11485849310.pdfIn PDF document text
    • https://www.ijdsir.com/ckfinder/userfiles/files/20819353007.pdfIn PDF document text
    • http://plantessentialoil.com/upload/files/48556507516.pdfIn PDF document text
    • http://xn--jt2b56wn0ap2a.com/upload/file/202109112020235016.pdfIn PDF document text
    • 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_off0000d52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52B 21024 bytes
SHA-256: 6bc142d7e100186f1ef8599a5806d5339c16779488085ce12b3ce492707b472e
font_01_sfnt_off00010cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1