Malicious PDF — malware analysis report

Static analysis result for SHA-256 0acd8a132ca48e8d…

MALICIOUS

PDF

201.8 KB Created: 2021-06-26 17:35:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f2d5615d78c388a9478d7dd79208dff7 SHA-1: c84ae736739467274b8b4091f2b21a9663ff0573 SHA-256: 0acd8a132ca48e8d0a3525892aba8d9c3dd81fc527ad398a0044aa3f354237dc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains numerous external URLs, many of which point to compromised WordPress sites, suggesting it is used for phishing or to distribute further malware. The presence of PDF_URI and EMBEDDED_URL heuristics indicates the document's intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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.
  • 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://krisoc.ru/uplcv?utm_term=taylors+mistake+baches+for+sale PDF link annotation
    • http://posekatzahradu.cz/files/file/76892218957.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/034b92c92da042b137575fe1a8a0d0fe/98702178423.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799d5115918---18532072284.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160abd128dfb20---loxaxijiwosewulivupelefel.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/mipesupimanogelepuxefu.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607368090db3b---bufutiwisejenig.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/kaweronat.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607497f4b9c0a---22729035723.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/gujilisufetejubefasapov.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/babafefapinovegijujomo.pdfIn PDF document text
    • https://cahayaapi1.com/contents//files/16148544754.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4820ad1b7---5880715661.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c311c3757a0---53492518009.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/77638113482.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/usu83kqi6p9cs8ilbgo49cd655/23867903629.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d5d7f0a9d---ravimiviwi.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/gutodizipabupozolab.pdfIn PDF document text
    • http://isystem.hu/ckfinder/userfiles/files/koxames.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7f4de0e29---81685076968.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/qv3pu27b7kds6ue9lqonp9g316/dapavidaninezisigobipow.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160770ddc3df48---1651498137.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/24259433641.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_off0002b817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B817 10808 bytes
SHA-256: 625b842b892b17113ef47fe02dd3837032c24b935abfa11d1f96667477586f63
font_01_sfnt_off0002d118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D118 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002e92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E92A 18500 bytes
SHA-256: b867c3f46017ef2ee6926dc437bcb15681e1516f01ce48a77346834499034bec