Malicious PDF — malware analysis report

Static analysis result for SHA-256 e550a3d5d4e4e3f7…

MALICIOUS

PDF

83.9 KB Created: 2021-09-10 04:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 25e8f1405655da9becdcfff41313c35e SHA-1: e1634366f3221aacfffef62d5de3076d8e1894fb SHA-256: e550a3d5d4e4e3f783de9e157180cd95b2a61216716f34f4af975955748165f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a large number of embedded links, many of which point to compromised or disposable hosting, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious link farm designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://lrsdev.com/userfiles/file/jejalezegenip.pdf In PDF document text
    • http://likebarcode.com/image/files/20210904_073437.pdfIn PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/karudizofexaripuwebe.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613391c9b6727---pakuduzesilofa.pdfIn PDF document text
    • http://handinks.com/ckfinder/images_store/files/polisotadodirujubujus.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/kadugogebuxosezezepoki.pdfIn PDF document text
    • http://alajwakh.com/uploaded_files/userfiles/files/41273387070.pdfIn PDF document text
    • https://floresdeserrezuela.com/aym_image/files/kovomewodonufujebisux.pdfIn PDF document text
    • http://pravkniga.ru/files/userfiles/files/zujiwazevag.pdfIn PDF document text
    • https://cebrigantina.com/025-CEB/images-editor/file/vubofaj.pdfIn PDF document text
    • http://liily.jp/upload/file/20210906161122.pdfIn PDF document text
    • http://sh-songshi.com/admin/upimg/file///46694609738.pdfIn PDF document text
    • http://myesen.life/userfiles/file/14380090969.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/161310bdb8ffae---rolepi.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/41114549331.pdfIn PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/mibetesubuxut.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161365bc4ccffd.pdfIn PDF document text
    • http://delta-serwis.pl/pliki/59482543706.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/juwoxagebifofuje.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/50822959273.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612f720690d1f---4788422771.pdfIn PDF document text
    • http://webbyshoe.com/fckeditor/userfiles/file/sakodo.pdfIn PDF document text
    • https://ladida.asia/sporlegen/administrator/imagetempfile/87579726301.pdfIn PDF document text
    • http://centronegozi.com/public/55441244371.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210908_8E7229B9ECAB34FB.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=harry+potter+game+mod+apk+unlimited+gemsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC302 11032 bytes
SHA-256: 2d711c7115182a581569ebca8c45f1dbff393cfbbb4d4c1f77afe153111c4d8a
font_01_sfnt_off0000dc6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6A 16148 bytes
SHA-256: b17e3c388ca520c70044df51a505a8c8de3d1ca9b2e495c629779bc8d31aca59
font_02_sfnt_off0000f1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00010a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0B 20220 bytes
SHA-256: 2298118824d59a86265dd4fb9f2f19d816435598446328270dfa74a4b5b1c396

Open this report in the interactive analyzer, or submit your own file for analysis.