Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed049ff498c42b85…

MALICIOUS

PDF

83.3 KB Created: 2021-09-07 02:33:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a3b3fbfc4a3829e5f00dd0e9cee105d5 SHA-1: 68ef04f050da4c4062c5947e085499621b6be451 SHA-256: ed049ff498c42b85a653e1e9a1970f3fdbd25275dc5739fe402960a6da4a4f74
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection as a phishing trojan. It functions as a link farm, containing numerous URLs that point to websites, many of which appear to be compromised WordPress installations. The primary purpose seems to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 https://chcial.ru/uplcv?utm_term=hp+laserjet+pro+400+mfp+m425+service+manual PDF link annotation
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9f8756bbb---jefewosiridelosu.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/8a179f3a2d6bb220390faf26973bb2b1/ruxigidavilofaburamepuxix.pdfIn PDF document text
    • http://centrons.com/uploaded/file/112065204060c7bc0cd273a.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/63917021269.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b21646d47---bixufumebesitigiguriruneg.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/jodulifitaziboter.pdfIn PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/simovaxojozaj.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/0d19980a26b509924b7e7354859bc54c/1494388047.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4719bec7b4---43073233832.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d8765889a---minupulodelezumulowu.pdfIn PDF document text
    • http://bayernglobal.de/userVZ/file/kukoregiregifanolepoxisov.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/69691514999.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/tavedemakebobelitexotesi.pdfIn PDF document text
    • https://darkoyunpin.com/calisma2/files/uploads/miwawotedawutunavibubu.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f8ed1241e8b---mofuxivotadamipasugowo.pdfIn PDF document text
    • http://sparan-art.ru/ckfinder/userfiles/files/15222648301.pdfIn PDF document text
    • http://nbnjl.com/userfiles/files/jilevixovusedawebazuvo.pdfIn PDF document text
    • http://monthclean.com/uploads/files/202108241650575252.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/9bd54a048c1bbae6b7ffc681dfb344ba/47305155515.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/jofopefafaxudunilamer.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/zinuvi.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/bavogozerorigazasu.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/2cb87902c342e6ffd94f02359814ff11/fosanubirevomopawebixave.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_off0000deb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C6 17748 bytes
SHA-256: 758862eb6a506d0caf07b0aefd218866897119652653da5138de9520d4964b3d
font_02_sfnt_off000124ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124ED 11380 bytes
SHA-256: c69226e5985199785930a3975b874ed00fa3c0de455473da7ee8f674af228c10

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