Malicious PDF — malware analysis report

Static analysis result for SHA-256 048ed53c650e5648…

MALICIOUS

PDF

85.0 KB Created: 2021-07-27 16:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7e6bd05cd2ad0c26bb973ce806652c55 SHA-1: e66ee58b75354b002953b4e50fb07794c14e3000 SHA-256: 048ed53c650e5648c144a89dfa28f75d2513ee7693852ac882122132ec5d5b96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/256cba8219cfac0593749863738ba230/javopamamarudixo.pdf In PDF document text
    • http://morgancountyoh.com/userimages/faxawumetibafizumilixaw.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b442ad13b---gixadazidotisegopove.pdfIn PDF document text
    • https://afayl.com/userfiles/file/kidilemimi.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/99713591755.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/34691315632.pdfIn PDF document text
    • http://avs-market.ru/admin/ckfinder/userfiles/files/vumiwixenugunabiruvikula.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/51917768694.pdfIn PDF document text
    • https://puppometalli.eu/file/gasojiluzifure.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/859dce94c836a66b72284fd652ef3104/3778299465.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/filudij.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c64c65fe0---pasiziz.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/68128389198.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/65292348546.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ecaf0459b---9812265682.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160949802ec93e---mifebimuduxowevenetus.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/kagepuvinojefapavavepipu.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c145255464c---97574337880.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/0t16g8tjmauqdshniev08ojs69/dedojejur.pdfIn PDF document text
    • http://shelton1961.com/clients/35589/File/temerodamik.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/8e12c92f9bcf033f7507261af0f75cd9/tozowozavorovarusaf.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/pizokijaraxemodotidufigo.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/gerogovowexekavaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=this+is+gospel+piano+sheet+music+with+lettersPDF 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_off0000e820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE820 10968 bytes
SHA-256: 9547a514a41409bfbe0ad17ff6052829e69b44f7ae426b30cce8693b1531cf45
font_01_sfnt_off00010174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10174 16844 bytes
SHA-256: 4a3406cb9b6494b6bc33f6a98b14aed6ce007f5ecdf107fca2bd265bb4213716
font_02_sfnt_off00012d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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