Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d4d4e62cae428b3…

MALICIOUS

PDF

145.6 KB Created: 2021-06-22 13:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 72dffcd34aa4eefbc2457e86fa88c674 SHA-1: 43d2de2b2460608187408b2a53a005661d5d53f3 SHA-256: 7d4d4e62cae428b30399716fd601122ce68c23ba9009a1a46c8dd70ed54f9d58
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9505

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sieuviet.net/webroot/img/files/golimopudepemexo.pdf In PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/580bf5e0aef8fbeaff71991796753bbe/15197388065.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9386153d4---47771632706.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607726e8cba57---vizubotobodisema.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/59437964555.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/81517099454.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/669ae8d8d320c52b69c72cfca9d11af5/93936718038.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/88222258973.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd502802bc9---dilebezupasin.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/fvd0a670br2bsn0h9qbhmfab9k/12751750952.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/12376230243.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/patakofugazasikuzobolag.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6f3f960116d474638bf3406223aa8d9d/jugigamabefopuki.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb8bf68c17---kafewok.pdfIn PDF document text
    • http://cadeco.com/testingsites/advantage_aviation/assets/media/file/51335301570.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=fort+conquer+mod+apk+hack+downloadPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/lgpl.htmlRegularDanhHongIn PDF document text
    • http://www.geocities.com/dnhhngIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CEF3 5372 bytes
SHA-256: f12a916cb9cdbadcaa8e6c40ca4637c02b11e7075ea01f726471ff99eaaf4e7d
font_01_sfnt_off0001e118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E118 10364 bytes
SHA-256: 530e83d43dd7020c91b856f0b7e563cb0f074cfc284ef4119019952528740f01
font_02_sfnt_off0001fbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FBFF 8020 bytes
SHA-256: a789780dd36a4b7d443e3198b4fab5f14bff2145d7b853089f63d36e02c1670b
font_03_sfnt_off0002171e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2171E 23412 bytes
SHA-256: 9efee5c3b8c928c3e94ef509247ceae756ff3c2e86b105151c435b70f7383bb2

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