Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a3ae426b32fab05…

MALICIOUS

PDF

92.2 KB Created: 2021-08-04 03:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6f0a93b13d39e4fcc8efe4df7c991614 SHA-1: d4185e49081a4fd16315a7fbfeae8683d0f607af SHA-256: 7a3ae426b32fab057e5a699d8d15efbfd81cdcddc56267b21d418c3a947ad7d3
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to compromised WordPress sites, indicating an attempt to deliver a payload. The 'Password-protected archive lure' heuristic strongly suggests the user is prompted to download a password-protected file, a common tactic to bypass security scanning. The ML classifier and ClamAV detection further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e0ff39f234---67335507729.pdf In PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b349cb17d---wolelefabuwodafob.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/mefadafatiw.pdfIn PDF document text
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/1f91896a29747af2f0dfb397f4e3b60b/rulukufifinepututejezer.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/ef172c6912f48edc2e784b09d6d5cf35/2308887147.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/da7c4b79ae7e694b05d44092c58918f5/56417421518.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bbdb0c1df86---41632195366.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c4e872769---gifolevepuxe.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/9091647618.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/mpqm23324d8mbf37ts5j28mbke/23466120058.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/gakigirivufiramum.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769b28e97e7---zujawivo.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/20263914379.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086b86269bf9---fobotonuzadofem.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/25094609273.pdfIn PDF document text
    • https://cooperspick.com/files/murok.pdfIn PDF document text
    • http://www.sm.ac.th/ckfinder/userfiles/files/kutorunasalalulevaw.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/gefijakilonopad.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/55957843055.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5acad994b8---fumabexuxafiximiwe.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/ludif.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/73102936155.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1fc2eef0e---zuwobowixiw.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/kakemurevitoxanazib.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/petaduguxuvebivuzu.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7eff86c6a---ridewalijup.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/31473811375.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=coraline+pelicula+completa+en+espa%C3%B1ol+descargarPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEC 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_01_sfnt_off0000f42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42D 17668 bytes
SHA-256: 5581f8c663922daa133ee9111edde0986ce11c0b782d41811e694035f6b1aa78
font_02_sfnt_off0001216d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216D 2768 bytes
SHA-256: 27b897ba678e017baaf3054fc2db98be47becf97582207620ce2f55551111ad6
font_03_sfnt_off00012ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE8 11192 bytes
SHA-256: 46b480aeabb079527400090faad2aeb1af1615c9db03cc86417a402cda27af53
font_04_sfnt_off0001469f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1469F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1