Malicious PDF — malware analysis report

Static analysis result for SHA-256 06408cad6d89626b…

MALICIOUS

PDF

75.1 KB Created: 2021-09-15 13:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1c40339b7bd97d08ab405c1b39756b3b SHA-1: 2fa26d87fcf3a310b87a009394fa594e69743c53 SHA-256: 06408cad6d89626b0d444d08e3ea5bac7c877095890421cd29b22c01b7efaa4f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9828

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://inwebjor.ru/uplcv?utm_term=country+western+line+dancing+near+me PDF link annotation
    • https://relaxbotanika.cz/ckfinder/userfiles/files/dadatomujufirogutefib.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614111b440607---16079957842.pdfIn PDF document text
    • http://innotack.com/userfiles/files/95799938778.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/gizavezofaxogixuled.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/74032085134.pdfIn PDF document text
    • http://lor-rostov.su/userfiles/files/91752214914.pdfIn PDF document text
    • https://rowanmkt.com/Uploads/ckfinder/userfiles/files/92578591253.pdfIn PDF document text
    • https://v-rshine.com/upload/images/files/nerezoba.pdfIn PDF document text
    • https://best-label.com/upload/files/malek.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/sakesonebewufawezutol.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/labowatiledugupa.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/65813630043.pdfIn PDF document text
    • http://gunjanjain.com/app/webroot/js/uploads/files/40221894572.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/78449073377.pdfIn PDF document text
    • http://kisito.com/userfiles/file/63702797065.pdfIn PDF document text
    • http://alvitraders.com/files/zuvadasukepasowukuka.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/19197105359.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/78144074617.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/161302e1019b23---zobokijikafebow.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/pedovugegivabita.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/49510503043.pdfIn PDF document text
    • http://erodiertechnik-wenzel.de/userfiles/file/46816648258.pdfIn PDF document text
    • http://klm-co.ru/foto/ck/files/ropabibexuvitozomex.pdfIn PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/27926730742.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/tubobozoboxofap.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613159a71dace---tubiwogoruniziv.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F8 17104 bytes
SHA-256: 71e8e473ef9e680506070fbb20e86c5b4285759a67b87dfd42d366b1a57885ec
font_02_sfnt_off00010513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10513 11044 bytes
SHA-256: a05bda0e4aeeb55b592129a5e5ffa4589de78b723d38a8b0fd6dfc53ddfedaa3