Malicious PDF — malware analysis report

Static analysis result for SHA-256 fedfb534d721d616…

MALICIOUS

PDF

87.3 KB Created: 2021-08-25 00:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 3d7058137024be478c24fa16771abd64 SHA-1: 3a057550001aff92ce70ea9d866f81e91919bc32 SHA-256: fedfb534d721d6164b4e1bfd26e326738eaf2df49ea96a6caa006f9172ef5790
124 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or malware distribution intent. The presence of multiple PDF link farm heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3749

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 http://takeacode.com/user/d41d8cd98f00b204e9800998ecf8427e/file/45625176449.pdf In PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/46b573522543978127e773c0465e2cf9/dalibozagomiz.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/vi2288n137ka8cr667jtamqo55/buwomitisewonusomonar.pdfIn PDF document text
    • http://1-sanya.com/blog_images/blog_/file/50955528465.pdfIn PDF document text
    • http://consade.com/userfiles/file/32641801547.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/00009d7b9df01e5724cf09b1c04341b2/97276745369.pdfIn PDF document text
    • https://mannoorpally.com/uploads/file/kuzifibafiwotewezadugez.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/rozuwipato.pdfIn PDF document text
    • http://gpp300.fr/userfiles/file/wanop.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094cf7dae772---raxapilefabunalonoduk.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/a41ab89caff0e38590727b39aba55f70/84185530281.pdfIn PDF document text
    • http://arenda-v-novosibirske.ru/ckfinder/userfiles/files/65596858294.pdfIn PDF document text
    • https://nbcmedia.vn/ckfinder/userfiles/files/98642023640.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d6dc5fef54c---daguzelemudul.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/wimazejuwerebobevufekiwol.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/6b5f56b603df534210c2062d9237aba8/80108209800.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/lilepipafumabikukalil.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/busakagilililimelapelur.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/26230452624.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/26657148251.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16080b5fdae4fb---muxosujidusutezikimorome.pdfIn PDF document text
    • https://digireg.cn/upload/widusozoxe.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cc4b6ddcba2---56723507013.pdfIn PDF document text
    • http://stonebreaker.at/27962837289.pdfIn PDF document text
    • http://kiuanai.com/userfiles/file/gumoboxesotetaluvafag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=pdf+to+ms+word+converter+editablePDF link annotation
    • 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_off00011ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13707 10928 bytes
SHA-256: 4e51e7f14f46566584b6a84967b5677e50b723c1b7ec640da9f9eaeda58d4a8b