Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd454020d57ed906…

MALICIOUS

PDF

99.6 KB Created: 2021-08-01 13:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2e3d449055e8d5fff29bca827ecca227 SHA-1: d30afa063bff5f17287fc991e49f689169f4d417 SHA-256: dd454020d57ed9068ef24248c513ff38aee9baaefd2a3c434d80053552c012a3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to compromised WordPress upload storage and disposable hosting, indicating an attempt to obscure the final malicious destination. The ClamAV detection and ML classifier strongly suggest a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/c6c2c9f4e5d0e1362d072cdb26c423c9/vakolobif.pdf In PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/4467455863.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/bc6530623a6dab00d310610a4d3c78e9/95299780233.pdfIn PDF document text
    • http://ligneus.hu/upload/file/fofokutowezekibokezisus.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/wazidewarod.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/7e7675add72b0759eec6451650dd5bfe/gederiliwa.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/92342cc0a0711e6517c2638aa3d9a898/tusavutesageratajiguna.pdfIn PDF document text
    • http://kappp.ru/js/ckfinder/userfiles/files/lusagiwi.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/q4dvqup148udl65jaspuj88f73/lawav.pdfIn PDF document text
    • http://movementlab.dk/userfiles/file/91384956715.pdfIn PDF document text
    • http://masterkontroll.hu/ckfinder/userfiles/files/45683072464.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/16680014008.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4126ab88a---81190954977.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b3b744278.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/bixilitefogo.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7951316b11---tixuvejudurazisebafiro.pdfIn PDF document text
    • https://limsurdua.com/contents//files/tatidemunizulexaxuguj.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/kia74fip1mfujmljip2tmg1u0q/dujitut.pdfIn PDF document text
    • http://congtrinhnhaviet.vn/upload/files/lasavumujonifif.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/440d24c647064df31702af0bae649610/79098285004.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/93124421322.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16078517f03948---nipiwirulozo.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/nimafogef.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/7531630d8cb99adf0885535a48af7a42/42255617051.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a153b2eadb---80283720791.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+cheat+in+pokemon+omega+ruby+citraPDF 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_off00011ada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000132ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132EC 18472 bytes
SHA-256: f2a38423ef78420709ae4f4aefc745177af9b25b65f9d6b0ef5ff865ab0b84b1
font_02_sfnt_off000163cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163CC 11132 bytes
SHA-256: 91db732a2217f47fc11e50cf106b93327764295da3869d0d50972c5adf9cd7f6