Malicious PDF — malware analysis report

Static analysis result for SHA-256 69815ab8832a0f15…

MALICIOUS

PDF

78.1 KB Created: 2021-06-27 17:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c55afad140d1565bbdc38ecd6e6d5bcc SHA-1: be00d76ae6a31f6d89a826ce146f04d306de66a9 SHA-256: 69815ab8832a0f153331ce08f2def03a00f9c57b99685214f737dff71e5cc611
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or trojan threat. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The document's structure and embedded URLs strongly indicate a link farm designed for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5624

Heuristics 5

  • 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
  • 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=how+is+a+car+rusting+a+chemical+change PDF link annotation
    • http://novosib-sport.ru/ckfinder/userfiles/files/14146847156.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/793a65250222016005159f5f42894d15/7488435737.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c40e65badf---famifuwis.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/76136816275.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1u6sg360u61lv7lc0vknt4vqf0/16130902178.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/4er8c0iuikmadfj0q6tb9vsm8c/xosiruvi.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/figifuvitobi.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/73329778898.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9c4c32753---figiledibawezise.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/efb00746406183ab94c49dec64e48b59/takukobuluduwif.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/tunup.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b649e327be1---48808032048.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a24e37ae390---kapetuwe.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f484361c2---mejubulijijukanile.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad032ae84f---bofuve.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/lexigodurugejid.pdfIn PDF document text
    • http://zonwering-nederland.eu/ckfinder/userfiles/files/zumabebawet.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/50dh0tiihpdmmasp4jf9ffuhpb/jekuwuna.pdfIn PDF document text
    • http://xenangheli.vn/public/files/40080608613.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d35b8e54255---bisezawisokekamifug.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/2d3e2d3d28a573f31a8193f2d6ed68dc/zarudigigunolex.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/rusekisawisemosipaw.pdfIn PDF document text
    • 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_off0000ec01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC01 18308 bytes
SHA-256: f04445d370f3cf3b2b4fb98bd9f68d9f21267447118f1a363175fc4c52607e67
font_01_sfnt_off00011aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1