Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe32c1b41d5b75d8…

MALICIOUS

PDF

86.0 KB Created: 2021-09-20 21:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 12296537db47cdef5592253bb0c0adbf SHA-1: c2dc0dbd1313a197fc88c234c146494dbf8c372e SHA-256: fe32c1b41d5b75d8b5fc80ee54e109b15f1ffd6e6259aff89cf9094df9e2aa5d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irlanc.ru/uplcv?utm_term=crime+angel+superhero+vegas+air+strike+mod+apk+unlimited+money PDF link annotation
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/161414622f0653---56301174506.pdfIn PDF document text
    • https://vr-spagna-20.effievirtual.com/galeria/files/83947142367.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/zopubefilaliwafeja.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/mibaxogogorebulat.pdfIn PDF document text
    • http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/kamewukakenevos.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/31e27119bb5526f140fe0b4a4b4ee592/15174354430.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/11iiocpcveb8kh5v089q6m2rru/67985409682.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/bodesu.pdfIn PDF document text
    • http://ihdbd.org/upload/files/buxinudixukapipe.pdfIn PDF document text
    • http://crm333.com/documentos/file/pufelisutate.pdfIn PDF document text
    • https://apgr.eu/UserFiles/file/fejelimiro.pdfIn PDF document text
    • https://dom-titan.rs/files/93173320976.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161446190a4da2---84493900227.pdfIn PDF document text
    • http://ghettaetamionarchitetti.it/userfiles/files/wadamori.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/vajuduzefimiravamo.pdfIn PDF document text
    • https://h1t-urlaurora1-turbo.com/contents/files/52513092904.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16142f5cea9730---14107602402.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/56002957548.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210917181717279.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/20464941849.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/libegawaga.pdfIn PDF document text
    • http://lovesenergy.com/file/luzegolefusoxatosanuzixu.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/28854154196.pdfIn PDF document text
    • http://prestopc.it/upload/file/47279872019.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1613d4d5b7c1b5---40921663856.pdfIn PDF document text
    • http://webursitet.org/Files/file/wuperuxogo.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_off0000e368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE368 11240 bytes
SHA-256: c0fc6bc84867683089ea8662872d0b55ee9a08bf8b71da20c4c17c57bf4d2b56
font_01_sfnt_off0000fd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD65 19648 bytes
SHA-256: 2660e275fb0e9e4b6d422d36cb560e2c4d87515e3a7034de58df0e123113a20a
font_02_sfnt_off00013168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13168 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1