Malicious PDF — malware analysis report

Static analysis result for SHA-256 82600ee02d467071…

MALICIOUS

PDF

91.6 KB Created: 2021-06-27 07:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 8980686d63125415a0cca4917508fd14 SHA-1: 04b27c24f84a73185642f0be0aab102cb8c073ab SHA-256: 82600ee02d467071f407c06b1a2a916fbb463401009c207df43cf2b2210ad315
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites. The primary function seems to be redirecting users to potentially malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://jikaramen.com/uploads/files/gupawon.pdf In PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/da6d87eee201ab1dfea9b50e4892573a/fowogejol.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/basagapimid.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/4690513199.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5c0f5c96e---zatulojedevepixa.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/newotiporesije.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/4e1ecc535ee6bd74e20fd68ea4cdb3c5/8254871262.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb41fe7f35---rirojeludonumuzus.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eaf89959c4---zadisowidowepa.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16077c63a35713---diponivurubinurewokedozu.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/07d6740dd3111440e54f19be4164a639/baxadowevetiremu.pdfIn PDF document text
    • http://northwestpixie-bobs.com/clients/e/e1/e1941a3904c49320334fd90e0ed9e852/File/61544500322.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/82eec6da3cf5181fcb1c3b3acd6e3b27/16852767311.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b94cc0950c7---fepevebezikuvi.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16072a3705a85f---19481023371.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607121a020670---zonepofi.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/wofago.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/99b3e7chmvush0lmjtfbdq69th/warimiferezovalo.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c73ae20185---41491781375.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/33593266318.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b594cae7d---julariketalotijujasun.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/fc76ba3f79451267c48c7380dc4305b8/nukanegozegomapobora.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/68960840229.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608044704b232---7397383790.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=5+examples+of+double+displacement+reactionPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED79 16704 bytes
SHA-256: c6d15079e1966cc6a6a8181c0ed21f61f46dc38c58e32fcb56d9ab0828f71df7
font_01_sfnt_off000118f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F6 16168 bytes
SHA-256: 1cfb00680a8a18ef5d5af493cc5b57cfe410abeba37087ee2ecd799c98b61e68
font_02_sfnt_off00012e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000146a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146A9 11160 bytes
SHA-256: e8dd749603b6315791af6eda73e9c12724c3094fe75b195f3818a2dfbbf2127f