Malicious PDF — malware analysis report

Static analysis result for SHA-256 e907bfeb84fb8ccf…

MALICIOUS

PDF

86.0 KB Created: 2021-06-26 04:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 04f6f2f6d68a1efc11a8b596ce672c13 SHA-1: 8ed537ced76ec4f91e5236a210efdd71397cb7f8 SHA-256: e907bfeb84fb8ccfc86877c8e3639457eeb479cd064fbf8323ca2ce94ce27475
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs that point to compromised WordPress uploads and disposable domains. These links are likely intended to lead users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://cructi.ru/uplcv?utm_term=apa+7th+edition+reference+journal+article
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/4qgl5q8q1fndfe75fimsmprg1k/49597981472.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/ed551a5d33322a2c581d110dad0bed85/46370895589.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/mk2h456qokqq6m7n8vgnan5j77/14895703109.pdf
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rejapotoxu.pdf
    • http://vksraja.in/fckeditor/upload/file/masetijetegubamesax.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ba1d5d342---nawedufarinezok.pdf
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/j5s2tqaascpvoapvgouiqrj700/nolupamuga.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-5/20210505174730799664.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/3a13be68934d54cad149865a96925572/rakuke.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e6831bc0f---kigaliburuvuku.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a3298d43d---riviruzari.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1b5d992ad---kexudif.pdf
    • http://esistore.be/userfiles/file/kojofamakomapuxamavimuf.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/0ea3ce7c412fef656a0f83c67353990b/dolutekenupawelid.pdf
    • https://pmms-online.com/assets/file/fofoxufoziwobobat.pdf
    • http://danielbushreunion.com/clients/41596/File/pafiseteruxalukabuxon.pdf
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/e1d3591b8ce254b3d1a3b17bf6981d00/busol.pdf
    • http://forresterfamilyreunion.com/clients/c/cc/cc72bfd2512333311cc1ef5a4fdef90f/File/fukilesipixixetako.pdf
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/83848864020.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/1d68b49cb5a0c95ec8b8692eadbdd77f/58898304905.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba97d50abd4---60433885544.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/4eaaad326f01cd9f19cd517aa7e9e667/36225377067.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b5c086d99---8892441448.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e82e.bin
4a3ac8817973afa8f7ea2e03a131edb1f7d54167cc2f57148fc1c67fa2f2e945
pdf-font-stream PDF embedded font (sfnt) at offset 0xE82E 18468 bytes
font_01_sfnt_off000117e5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x117E5 16792 bytes
font_02_sfnt_off00012ffc.bin
cff68705d21fd7bab355119faf53d3c9f22c584ac21d395826f054d66cfb40c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFC 10808 bytes