Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1c41711fe8cabd…

MALICIOUS

PDF

80.3 KB Created: 2021-08-28 12:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 4fdbc4db87e45e8fcef286bf2d5a1d50 SHA-1: 5d9e3a73dd57061a46410421ec0aeaf9974b2a97 SHA-256: 0a1c41711fe8cabdc7a745fae4727f7718d157cb201ced8afa5ef91cb9ee677f
124 Risk Score

Malware Insights

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

The PDF document contains a large number of links, many of which point to compromised WordPress sites. The ClamAV detection indicates this is a known phishing or trojan variant. The primary function appears to be directing users to malicious or compromised sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4749

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://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/07e1539c97c34de42327b555d4af2aec/91348428417.pdf In PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b04e29836a---zoxulub.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/nuwalivalozenexotu.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/857279d76a2c7d6f76678ceeff948b8a/13073137973.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/betiserilureka.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/38038757939.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a2d40d3e8---6920326019.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/vevazeleja.pdfIn PDF document text
    • http://dvg.asia/ckfinder/uploadfiles/files/fibilopemifurasowanazaw.pdfIn PDF document text
    • http://stavclearing.ru/upload/files/dekagiwedenukeloge.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/16579355502.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa3a715230---40146465362.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/zeziso.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743f5dc4e41---kujojefukoxogejimiwimaw.pdfIn PDF document text
    • http://high-keenltd.com/userfiles/file/73182694994.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/9bf4ecee4540eab5ce419dff156594cc/sekasedobizewuditewebabu.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160afe177616d3---kenegobal.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/1b643dc8825dfa23c17cba53f67b0041/7630131085.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/24309943668.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160d05a59e4896---14630379391.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b5676eb4673---dipinufodizevix.pdfIn PDF document text
    • http://imaginove.eu/data/Files/64968081163.pdfIn PDF document text
    • https://petikdaun.com/contents//files/toxedolalamipo.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8bbb5bca6---60760120336.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=lucius+malfoy+fanfictionPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E4 10436 bytes
SHA-256: 209d8090b3c252ed9be457f7cce9f01dff92cec22b217768a543f6f47dfed72d
font_02_sfnt_off00010d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D95 23344 bytes
SHA-256: 779484a2eb2f3d1816a85341ddb5e2b867ba20f716dd8fa6270fe0679b453c89