Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd0e7a4974bb9051…

MALICIOUS

PDF

75.8 KB Created: 2021-09-24 16:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5046ddde44d544de16352e5667a44e81 SHA-1: 80380e46aeb395f24c2b6e8c632b55727c95d4db SHA-256: cd0e7a4974bb90519d13c716a75c44e355ea4b96e6a531d4a49bedd83adc3d81
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised or disposable domains. The primary purpose appears to be redirecting users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://stefanourso.com/public/userfiles/file/zozumurarukopim.pdf In PDF document text
    • http://pazarziraat.com/userfiles/file/96806212118.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/dolewalujaponu.pdfIn PDF document text
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/16294652682.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/kuketunejoxoxujomufepag.pdfIn PDF document text
    • https://nslogisticservice.com/userfiles/files/rokigeti.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/60m9hd44hithteo6d8tfl3sfe5/90789314491.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/11303148514.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/8bb6199672efb30754888a4b782a4f8a/kajuri.pdfIn PDF document text
    • http://tabbanbros.com/admin/fckeditor/editor/filemanager/connectors/upload/file/ximamulenete.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/zopamizulafofojabevet.pdfIn PDF document text
    • http://sungwoo-n.com/userfiles/file/fepolip.pdfIn PDF document text
    • http://aspbae.org/userfiles/file/55204887128.pdfIn PDF document text
    • http://sjatupornservices.com/file_media/file_image/file/85235176591.pdfIn PDF document text
    • https://360clothing.indicsys.com/home/www360cl/public_html/uploads/images/files/30525127890.pdfIn PDF document text
    • http://filipdegreef.be/uploads/files/85619163161.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-9/20210909190111629652.pdfIn PDF document text
    • http://nhatrangpalace.vn/app/webroot/upload/files/vabuwisol.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614902d3361ef---54832658669.pdfIn PDF document text
    • http://fmdscu.net/userfiles/file/19586407790.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/22104223401.pdfIn PDF document text
    • https://sofupingame.com/calisma2/files/uploads/zorumuzipatozamexizi.pdfIn PDF document text
    • http://budropol.de/Upload/file/jifugegotewolukumese.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/6983443971.pdfIn PDF document text
    • https://thehouseconcert.com/ckfinder/userfiles/files/18135983506.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/gagawinojumiwaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=barra+di+ricerca+google+androidPDF 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_off0000c11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC11F 18920 bytes
SHA-256: 3bafb5576106450959857f2297d4f49522d43e3c9d57d934f6b03a3b8e4f8188
font_01_sfnt_off0000f22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A44 10332 bytes
SHA-256: 2cbc41c35cf670879270c6c14885a11d2c1630972071a9241955d0e6fbf6f443

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