Malicious PDF — malware analysis report

Static analysis result for SHA-256 094ef9ac21221ffd…

MALICIOUS

PDF

86.1 KB Created: 2021-08-11 19:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3836dd27aa483defe511add41bf780c4 SHA-1: 417e8cc260a03d14adcb6d085037dcc8839df862 SHA-256: 094ef9ac21221ffd822dedea6cee0d5fab39d0d778c139fb902194bf9049eaa7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://wastran.ru/uplcv?utm_term=how+do+i+adjust+my+ingersoll+rand+pressure+switch PDF link annotation
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160806434455a1---potaropodenuxebuvewod.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/11625457770.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160722fba3401a---12435264206.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160983333ecedd---fifiridokuzob.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/1547631991.pdfIn PDF document text
    • http://gabortech.com/admin/file/diwobisugulakevoda.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/n6o602eq8fkbfpcsegt9j9b7ef/67460632867.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6460916aa7---nodov.pdfIn PDF document text
    • http://cokhihoaiduc.com/uploads/files/86913331458.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/52632992203.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0bhtkemo17ppuem4q000aofb45/nabinelajetekix.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/acecb66975c78d97cb88c4e69e73c3bd/95680639991.pdfIn PDF document text
    • https://basundharamart.com/userfiles/file/86438800164.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/c6eab93be3875e81550fcb3a9d30bcd8/safipanilenukitis.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/1fadea4594d70709239ca56225a0c9e4/futimisug.pdfIn PDF document text
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/gizaxitigufovevemi.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0797d03ad---telubulumifodo.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/5775aea964383de505a0ae07dd6f8910/metinelevigowolovibipij.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/72676719706.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607081dc9fa59---9475854547.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/jinolugike.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/nitalazegilasix.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/41160928651.pdfIn PDF document text
    • http://shop-exclusive.cz/userfiles/file/61951292726.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_off0000ea81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10293 17184 bytes
SHA-256: 7969601b2762945882c3c749527dd9a884fec19fbd621622b454fd53ee0d455c
font_02_sfnt_off00012f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7F 11384 bytes
SHA-256: 266d3c51ccd6711a679860e7ceb5f7f6655a1e050c6a3940268a07759c139183

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