Malicious PDF — malware analysis report

Static analysis result for SHA-256 0067c91ab20bf3fd…

MALICIOUS

PDF

81.7 KB Created: 2021-07-25 16:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 710696456d9e1a1865938e2aad2d1261 SHA-1: 03e16e21d2fe2b727344bc98603a4a8bbfa92351 SHA-256: 0067c91ab20bf3fdb787a03dcb0eea5bf148ff432bff068f1ac586d7ea74a55f
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 0.6314

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 http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/vawipaju.pdf In PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/64943ce1451263bc9fbbd8097a7296ce/19161521353.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/fd25755137e3ad139164604fa5f76d87/47218828925.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe32777886---11011582844.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607d22c76ece2---91238524061.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/junotisisonevumem.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/16243259794.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/5520f83cff60418dbdf3a4603f4b568f/53832710454.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd814c9e404---tejaxubivim.pdfIn PDF document text
    • https://rh4-h1tapi-turbo.com/contents//files/49020185926.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160753227ba4f1---78552698628.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/1744654518.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cf2cdc459---49311709376.pdfIn PDF document text
    • http://flexa.cz/docs/file/sivipedifonubazolokuf.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021061021582112.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/latukiwesosotowawazebimu.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/buvusavusubilaxofip.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075e44448ae8---45243440119.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/zusalavida.pdfIn PDF document text
    • http://bephoangdung.vn/uploads/ckfinder/files/7489927784.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4381b4a1b---podiruxeju.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9099ecdff---wirepelidi.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d6734f3d5d---81292214908.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ebaadb3ed---fabunogijomiwofigiku.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070823572527---8748264772.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+turn+on+2fa+epic+gamesPDF 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_off0000f9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AA 11072 bytes
SHA-256: 507a2a585ed1688e217cf721c70df8539cf40fabcfce4c00687834e1c3a2eb79
font_01_sfnt_off00011395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11395 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1