Malicious PDF — malware analysis report

Static analysis result for SHA-256 386df055f0553db7…

MALICIOUS

PDF

65.1 KB Created: 2021-09-01 06:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c3dda62e55d6fc295625fd4ed8bb1eba SHA-1: 4957ed9ce5f2fdefb12427f02802c0cbe395e4a3 SHA-256: 386df055f0553db779c8fafa724c9bed48a702f94bb394dfade8845645bb0c3d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm used for phishing or malware distribution. The presence of external URIs and the nature of the links indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9109

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://medvor.ru/uplcv?utm_term=fanaa+movie+full+hd+movie+download PDF link annotation
    • https://transturist.ba/ckeditor/ckfinder/files/files/toxeva.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/0rm192ljuii5kspqci93b9s1s2/9173997265.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/ginobozixonoxuropev.pdfIn PDF document text
    • http://giasuthanhdat.vn/Images_upload/files/dezeladivadazolo.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd6bd28ccf---xesobazawevuxowejo.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af6069cb042---kojakafujipefuwo.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/58722463260.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd65e10815---96117430339.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/7f35f99e5fd822b65fcda27468edc674/23043606395.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jodup.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/12916431141.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/7e255c54fc9530880f1113edfa22add5/lobegud.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/36746360145.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/67103505520.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/19b926791867d851dc3dee1303bb5b4f/31451808316.pdfIn PDF document text
    • https://coatielectronica.com/files/fomefakujerutel.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/lka2ubp16o15gu5ggsrefcrgk2/fefavitijakiwulale.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16084d3db8b665---xudoponolegerekopifazelel.pdfIn PDF document text
    • http://mrmax.ca/clients/9797/File/65245831227.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/23cf04f917dac0ef0dc3d5233b877f15/38037319657.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/7f5ba8eeeeb594ddcd107778fe30b000/sekogidevatarabasuwujo.pdfIn PDF document text
    • https://medicabg.com/uploads/wysiwyg/files/88914745926.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-8-29/20210829034716622942.pdfIn PDF document text
    • https://www.kuwaitpolyurethane.com/ckfinder/userfiles/files/37637047225.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_off0000d9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D0 17364 bytes
SHA-256: c3606f847097c562e104b1b39dd42fe21fb169ee53ee67b3fc5f380c12899da8

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