Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecad1ff4a5c70399…

MALICIOUS

PDF

85.9 KB Created: 2021-09-10 08:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f4e7071bd47a18b340ad649349e82d54 SHA-1: 6722d2b4754b2ca0b06ebfd8214472ce321f08c0 SHA-256: ecad1ff4a5c703995dd0cc17de216b28feb928f686bd1976c5f7be3dc411dab4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to phishing sites or download further malware. The presence of 'cmd.com' in the document text suggests potential command execution, although no specific scripts were extracted to confirm this.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://allytemp.ru/uplcv?utm_term=watch+wandavision+episode+9+online+free PDF link annotation
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16132ec8f20c6e---45234493672.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/nogilogigakojawefek.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/aonmoqo67t5iu42tmsefib70i6/gogitolugimidew.pdfIn PDF document text
    • http://turbotechnik24.de/userfiles/file/nudigomap.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c3c08ccba---84785170428.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/34701215104.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132781e3809c---bivunisedimuz.pdfIn PDF document text
    • http://mayepnuocmia.vn/data/ckfinder/files/numet.pdfIn PDF document text
    • http://huntland.hu/upload/file/45048859468.pdfIn PDF document text
    • https://pannonfinanz.eu/editor_up/juniwu.pdfIn PDF document text
    • http://arnoldbolingbroke.com/ckfinder/userfiles/files/491744966.pdfIn PDF document text
    • https://ruedi-leuthold.com/userfiles/files/wapoli.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/kizugulip.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/potaxovuwubivinuvirogabaz.pdfIn PDF document text
    • http://www.moyekolodin.com/files/48148148245.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139c1aa4593c---jimakol.pdfIn PDF document text
    • http://ryanoomen.nl/uploadimages/files/pubonodok.pdfIn PDF document text
    • http://qdcmd.com/data/files/moteb.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/99589635308.pdfIn PDF document text
    • http://portableandcool.com/files/files/58738204665.pdfIn macro / runtime command snippet
    • http://barudan.hk/UploadFile/file/20210906063428780.pdfIn macro / runtime command snippet
    • https://yukkumpulgroup2.com/contents/files/79262053042.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/61573595411.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userIn macro / runtime command snippet
    • 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_off0000e975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE975 17812 bytes
SHA-256: 84ec6dbe32c87bb09ecdbaeb18a5d82b838592860ae71e8ad664a603455db7fe
font_01_sfnt_off000117f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001300d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1300D 11032 bytes
SHA-256: bf2e1e267300daccade51da0780d23b596d1e728e7c676e24ae3ba16e507b5c4

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