Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94f73bccf295c70…

MALICIOUS

PDF

67.9 KB Created: 2021-07-22 10:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 848fa7e4f9cee2dce9440bc9c706a221 SHA-1: 1fb17dd6a6bf3b1305392bbd9286fb8f55b57ebe SHA-256: e94f73bccf295c709ed895f2051e00014718131bb35b2ebba87f6ded0e07f631
124 Risk Score

Malware Insights

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

The file is identified as a PDF containing a link farm, with multiple heuristics indicating it points to compromised WordPress uploads and disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. The primary goal appears to be directing users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4539

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://okwmd.com/upload/fckeditor/file/vatus.pdf In PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc34cf0ec3c---valimuzixape.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210530212800.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c74447823de---7433353494.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/13c18396446c4351973607dbe35b4cb9/zabafemekunuxet.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f219c73250---winovejo.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/ibgvtihk51cc418tj5ran2u1u2/37926019664.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/76590011635.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/45448184551.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160978977b0841---88494049864.pdfIn PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/60371566144.pdfIn PDF document text
    • https://actorconseil.com/files/file/volelajaxawemexuge.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6105afe97912db32c60161e7767de23f/36065998578.pdfIn PDF document text
    • http://rford67613.com/clients/a/a2/a20594cba7d6fe247bc87ef9b80620db/File/86086661807.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aebf1add88e---toturusatukunosozufid.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/66907865165.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b52ed861f---sukakudawoz.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/85mh68919lb6mv66g1jni8t9vv/97881890571.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16075f11254aac---14124078865.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16088607bd5422---54785913563.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/retimatesavedolomavanago.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/71189016445.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/b8ed84b5cpqa8upmiqsdfku3b6/jatod.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/petu2resi69mtg9ki216v0dhp9/wilarebegonozagugiwusaraf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=stock+market+today+dowPDF 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_off0000d986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD986 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f19d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19D 10488 bytes
SHA-256: 30a332aed4cc5a30ef4acb2394e36ce94dff04998e0dcc2f80dae1e7dc64161b