Malicious PDF — malware analysis report

Static analysis result for SHA-256 c68895ede21f6bb5…

MALICIOUS

PDF

87.8 KB Created: 2021-09-12 20:37:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a52f9eaab6ffc29f2718eb4c74c24255 SHA-1: dd52a4728e3aeb404ad8b71edd05bbae1278fb6c SHA-256: c68895ede21f6bb54e5980cb4cc6d3240b2ccaa8068c40f97e410f8fb317c426
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for exploiting vulnerabilities or redirecting users to malicious sites. The presence of numerous external URIs, including links to compromised WordPress uploads and disposable hosting, strongly suggests a link farm designed to distribute malware or conduct phishing. The ML classifier and ClamAV detection further confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=nobody+2021+movie+streaming PDF link annotation
    • http://tweddlefoto.com/files_contenidos/upload/files/52934634457.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/wubusipovala.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161366d6c4a896---12085824350.pdfIn PDF document text
    • https://almentispharma.com/ckfinder/userfiles/files/fufewasob.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/pegot.pdfIn PDF document text
    • http://syntra.pl/userfiles/file/noluwawolojo.pdfIn PDF document text
    • https://bharatceramics.in/ckfinder/userfiles/files/13179658052.pdfIn PDF document text
    • http://revucue.com/ckfinder/userfiles/files/14050791198.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/78894230115.pdfIn PDF document text
    • http://tucsokszekszard.hu/images/news/file/78349705529.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/bsdbad4l5f147jjv03ops1cbcm/34760628869.pdfIn PDF document text
    • http://jjc-dev.com/userfiles/file/60440657837.pdfIn PDF document text
    • http://noithatmyhome.com/img/files/mufuxemufum.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/dufub.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/97033611943.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/97243809546.pdfIn PDF document text
    • https://oncetrabzon.com/resimler/files/57995670491.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/ceab78e74c533d9cfb229b55107b0c57/2523859151.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/161387a4668676---57611940839.pdfIn PDF document text
    • https://rotterdampools.com/contents/files/sekel.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/judosetugunudop.pdfIn PDF document text
    • http://tostonet.cl/ckfinder/userfiles/files/vinikesafo.pdfIn PDF document text
    • http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/43757394372.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/wifimisesarezesibofapid.pdfIn PDF document text
    • http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/79940229840.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_off0000ee45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001065c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065C 11136 bytes
SHA-256: 28bbcfb002292f23039c0ab067ec4fd04722eb3f47f8fa68cddbe10025546d2e
font_02_sfnt_off00012044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12044 18800 bytes
SHA-256: b53d51658cfa05d54bf1bf0d5ac9b9e4c48e53fe158dee2378a6dc6c42b0ce85

Open this report in the interactive analyzer, or submit your own file for analysis.