Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cbbbe1e5756ac70…

MALICIOUS

PDF

81.8 KB Created: 2021-08-22 01:25:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 86549750e56dfd570c221b087041ab88 SHA-1: 213398b72657be99494c443d4e328cb1d262354a SHA-256: 7cbbbe1e5756ac70260db9d003b8849d45242bf6e155ad0fe2159159ed275039
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and 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. No scripts were extracted, but the structure and URLs are indicative of a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/boraselivisugexo.pdf In PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/35jh5hfjfaoeffo0dqbf5c4tgt/40007644268.pdfIn PDF document text
    • https://limsurempat.com/contents//files/48254082057.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f2a877695c5---wevisipedaluboxabibib.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/73739162593.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/wozozarubilamajojokanavan.pdfIn PDF document text
    • http://jfk1969nola.com/clients/873000/File/rasafomarezave.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/xurikekuredafomexa.pdfIn PDF document text
    • http://yorktownhs1987.com/clients/57482/File/5807067277.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/b2u6h8n7ismghjaptbaddtklfu/maboviwewuxe.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/fixedezimijeludufekiwa.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/lokufhu1d6ab2cp72a98p1m46g/bifelefupelejusudasi.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/virafulakiju.pdfIn PDF document text
    • http://ping-property.com/user_img/files/33737576047.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/gg0s0p9jsjmjsm6oi9aunfgh8l1dj3eg/33373538024.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/ade6263b192072fd400c6952742cf98e/bidarobijadedobezewuwu.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16070afe03dc6e---gafuwisokonebol.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/72658887098.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/vh4fajlvahj3hgpc0s555oupjc/54071993177.pdfIn PDF document text
    • http://bestbelly.org/content/files/files/mexadopezobare.pdfIn PDF document text
    • http://toonesk.com/upload/56233792763.pdfIn PDF document text
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/pozujizevomasa.pdfIn PDF document text
    • http://rsst77.ru/upload/files/65250819161.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/la9r0p22gob46vem7lgrpibqkb/zizazewobib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=ella+mai+songs+mp3+download+freePDF link annotation
    • 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_off0000dc2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2F 10984 bytes
SHA-256: cafb2be8492cf5a4a08ad00b10a518ecabad0dc2f595e944311335d9e888b263
font_01_sfnt_off0000f57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57B 16720 bytes
SHA-256: 4eeb6961d0fc62393cf6de6c0369311efb8bdaf643a6af36130efa50f1bebac2
font_02_sfnt_off00012116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12116 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1