Malicious PDF — malware analysis report

Static analysis result for SHA-256 3473f42ad671e06e…

MALICIOUS

PDF

62.3 KB Created: 2021-07-01 15:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7fe9fa21ce6d0d4d97182d61a1cf86e3 SHA-1: d568054a571cb5f41cd2e8e5fcd13f8159a6c21a SHA-256: 3473f42ad671e06eeed42e5fa0194ee83428a861dbcc6750e53bd173c8c30fe1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The presence of external URIs and the overall structure suggest it is intended to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6412

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://catamma.ru/uplcv?utm_term=ductal+carcinoma+in+situ+stage+0 PDF link annotation
    • http://uniradioweb.info/userfiles/files/vuzuvatipaf.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/ed5d959f17be78aa6ea3446e0a9e6ac4/10445404061.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/5d191710a0fb170127943aabd08d6bcf/35199803556.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/fuxifosofij.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/jotufobodupukozerovij.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/dc82885d06e172a4ff7a1a8f38dc002f/46170211438.pdfIn PDF document text
    • https://xn--80aanugxqi.xn--p1ai/admin/ckfinder/userfiles/files/53340877177.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf0086f470---xomulozela.pdfIn PDF document text
    • https://betibg.eu/webroot/img/files/6167390160.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/b54f8d42e03ab19246a4b971d6fc7fbd/92432225822.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/6b4eac47aa66964d620e2372dd9f43fc/lasizofejigujusi.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/e3vqgj3c92h1km2pqmoc3198d2/bafune.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8f0852d92---pipogol.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/f4b1ce6209e844ee8ccfa68dbdbf8f91/tubuvilamurunagogaga.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce080cafc4---sigaxipofuxived.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/94df749eb6be3d124aad022d7a7f4bd3/72139860561.pdfIn PDF document text
    • https://kopari.hu/files/file/warogovazapawixur.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/lavibokawebevexatopaka.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/besakexajebazivawanod.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1609969f88db32---70281715373.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d67d484e0d4---pujonovoruboxifet.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c2e711363---wawemerododaxavad.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/f3d705c1ed52e05bdb95b211f79ab67c/wisufijidubew.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AB 10796 bytes
SHA-256: dbfc37aaf6a960a2f952b0c1efee6e2cef127b99c399f8deca84ef54fd8f934c