Malicious PDF — malware analysis report

Static analysis result for SHA-256 f180e009f40823be…

MALICIOUS

PDF

71.9 KB Created: 2021-09-24 19:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fe004a4ce4b4a552f388f5ce95dec2f7 SHA-1: ec8afec541afc66978cc8ad57b989e864dd255bc SHA-256: f180e009f40823be021766d0ac6c9abed9e3103f9438c4ad7d64b308b225bc87
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, indicating an attempt to host and distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 6

  • 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.
  • 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 http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/161461ca8abfb1---bukek.pdf In PDF document text
    • https://markmont.eu/editor_uploads/system/files/60904149335.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/161410fcec4ae6---boxawuroxamodag.pdfIn PDF document text
    • http://di-tech.kr/fckeditor/userfiles/file/34611288572.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/32999829768.pdfIn PDF document text
    • http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/ribejuzozobidiwelelonaxij.pdfIn PDF document text
    • https://harmony-lazienka.pl/Upload/file/benijelunoxugidisukemizo.pdfIn PDF document text
    • https://swaarm.de/app/webroot/upload/files/42383751827.pdfIn PDF document text
    • http://baozhaopharm.com/upload/files/vazubaxexeve.pdfIn PDF document text
    • https://www.mmgrowersg.com/ckfinder/userfiles/files/rutirenige.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/85404010849.pdfIn PDF document text
    • http://villkasz.hu/editor_up/rafanunaboje.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161401e844932b---fomajidarimuposo.pdfIn PDF document text
    • http://addon-colsman.somantec.net/ckfinder/userfiles/files/mafafibaralejefudamu.pdfIn PDF document text
    • http://orthodoxnews.us/file/38067444432.pdfIn PDF document text
    • http://studiotecnicostradi.eu/userfiles/files/nefefunujigided.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog/file/bumonoduloduzodemoxogibib.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/96004785458.pdfIn PDF document text
    • http://zuche0551.com/upload/file/wowezuzijutasibezomur.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161467d3a901d0---xazugivotejiwumezi.pdfIn PDF document text
    • http://evrokomplekt.ru/userfiles/file/volazididolakaxetis.pdfIn PDF document text
    • http://sparkpro.lv/content/file/zowigawariserakim.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16132617f352ef---42546732008.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/70576346842.pdfIn PDF document text
    • https://limsurempat.com/contents/files/50445057083.pdfIn PDF document text
    • https://www.blondel-bois.fr/ckfinder/userfiles/files/25288986418.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=all+my+loving+easy+chordsPDF 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_off0000b71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB71D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF2F 16304 bytes
SHA-256: 60bdab14a600a02679ab9a4d0aabb4c6646a691e7bbafff05fb4ee703cdb0158
font_02_sfnt_off0000f8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A6 10880 bytes
SHA-256: 4206c825003d2f2824ecc905c981554622e253a8ec8e8a5bf9c88f6ac7b2890a