Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e7cf01baa6eb6d…

MALICIOUS

PDF

84.7 KB Created: 2021-09-07 15:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 11bde98b21616c7e48d7dcaf0ad84490 SHA-1: c87cf4b8a3d9378a8300c30eed4ba7d50392b192 SHA-256: e2e7cf01baa6eb6ded0f8754a5411aaa3ec1b5945cac9a82b3f0fbd77d39c32c
124 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV, indicating it is a phishing or trojan distribution. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing attempts.

Machine Learning

  • Nyx PDF Classifier clean score 0.1831

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://ketchas.ru/uplcv?utm_term=balistica+pdf+unam PDF link annotation
    • http://imcborivali.org/userfiles/file/72055309756.pdfIn PDF document text
    • https://hoalavender.net/upload/files/kefamufupogepiboropizoxor.pdfIn PDF document text
    • https://askisan.com/upload/ckfinder/files/dusaw.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/81780bc8d702e4af9493aaceb1b43c2e/67484737726.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/r68s3i4ecj3e34ep6t69bvh087/65085267638.pdfIn PDF document text
    • https://balustrady-metalik.pl/files/10462085050.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/8vtfqct0lopk1l1vi3guju4kuk/jekivesedagelava.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/kidijowejoferovafusu.pdfIn PDF document text
    • https://houstoncoinclub.org/FCKeditor/file/minal.pdfIn PDF document text
    • https://hanoihome.net/img_duhoc/files/56088230955.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/841347c722ad3508ddeb0cc0ce6cd5d5/gazuxiroxuma.pdfIn PDF document text
    • https://www.vpn-solutions.com.pe/ckfinder/userfiles/files/kawamefedamudetop.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a514b2055---11444132507.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5257a99da---21145585980.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/58462662744.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/4adc880ffe8054b66da78f368560bbc8/rojunobabetin.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/45146374119.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/ajhlefbprpkrb700lg4l9039u2/wowawevagatarubudufiw.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/21996484758.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/8d0595c1bd5be936e5f5a311d475890b/suvofugutesedawibazanu.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/11933178592.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16076051d03fda---sivijibo.pdfIn PDF document text
    • http://sun-tes.ru/files/file/66504597374.pdfIn PDF document text
    • https://ultralloy.net/upload/files/73611865937.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/juvexigejezek.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/netemutubonukijez.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_off0000f976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF976 18268 bytes
SHA-256: 82bd9254c092be870282bcf91cc02ac6b4cb7cb3b0066d9744656affec22f9d8
font_01_sfnt_off00012933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12933 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1