Malicious PDF — malware analysis report

Static analysis result for SHA-256 90edca60de85a43f…

MALICIOUS

PDF

86.6 KB Created: 2021-06-25 21:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2e7595f4c80f16eed81f7a995ea9482b SHA-1: f17755be54ff3da5efec6fbfbfa630e8a9d0dfa0 SHA-256: 90edca60de85a43ff2568bfdcb43ac6cb2d43664e4319dca289929510f9c2359
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting. The embedded URLs suggest an attempt to direct users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://phunggia.biz/userfiles/file/14174098093.pdf In PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8260aec45---lemomegiremutevubexujibi.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/faxerumokupewip.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/ub5jdo47bh86an64pn3t5uvgo5/85024876925.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aad69b595b---bojogikot.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dac6d888a---56362070141.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c03fa47dd1---resed.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/aed3e118c66c8a60567483a9e3c74a20/temevananojigujojisaxami.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021061319312873499.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073703005b75---91510599899.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/76454875383.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/kidixadasenibokareruwitu.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5ef22482a---dowomixekemoxosuzo.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/5587189215.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/c263a91a149bfd850f1837c6bb7628d0/57930039036.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/c242258b7feaa2c47e692551d923d442/kogilewebizoniruzogez.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/i7mlgtcs0mmfc1hno0ifhmkkjo/motikitagudavaxawebir.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/9803652777.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/auupctdl0ca91p1n9fgi27k7at/17308388564.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b786fa15332---toluwazefomoz.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/kumumo.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/b15e3fbe7bb35b57e9f100d9519df829/41172180261.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/c8b0d5cf78bda4446f3104bd43136703/pivesegixizikej.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/7270732113.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/49116293525.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cdd20c49e65---93574862697.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/584a773219fe7613b9ae17196b950c97/89208881715.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=online+retail+application+database+project+pdfPDF 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_off0000ef58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001076a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076A 16784 bytes
SHA-256: 2f5dd71f8c3c744423a4cf0a2726b00d83eae013a0122e320b26a9d399bcc0de
font_02_sfnt_off00013362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13362 10908 bytes
SHA-256: faee11f4ee4b94a57b0bdc91921d8cdd304c8fd14bbfb11cf69e27301c6d9381