Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed0448dcc3a7b10…

MALICIOUS

PDF

87.1 KB Created: 2021-08-20 08:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5dbd005042e713376ee68cf48df8ff19 SHA-1: 256fb8852a9d4bfa5952d3353a0dd66429367d8e SHA-256: 1ed0448dcc3a7b1029af73ef452c2c64e5b24f2ec234e0cabf9481e6d9c97c88
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URI heuristics further supports its malicious intent. While no scripts were explicitly extracted, the structure and URL patterns suggest it's intended to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • 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://pixomot.ru/uplcv?utm_term=aeroccino+not+frothing+almond+milk PDF link annotation
    • http://boekenwinkelindex.nl/images/uploads/binutadalusalutufesef.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/17269749527.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/6425689954.pdfIn PDF document text
    • http://torbay.ru/images/uploads/file/86271737144.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/d2bf0f57e490b39d56b0d96fc120db5d/8836368458.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/cslbqe5i9kee6n5vt712mk5p2v/50873251447.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160924fca59210---76058448812.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c583e7a78b---68238252128.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8bd6155a5---56669408264.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/74032117e336b51aec42056a3fbd4e7a/41574401805.pdfIn PDF document text
    • http://safarekhoob.ir/basefile/safarekhoobir/files/72313218006.pdfIn PDF document text
    • http://beganijewellers.com/ckeditor/ckfinder/userfiles/files/97165869358.pdfIn PDF document text
    • http://www.feniuniversity.edu.bd/app/webroot/ckfinder/userfiles/files/42215022945.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/ui17g14fnk61t3odgi2n8465ki/gixurudezunusenoxobas.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd755635b3---dukebima.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/80372385666.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075452a40f8d---6953347458.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/71135662302.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b9b420c84---vitikewukerep.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/5kqh61p3nievarnkr5410d83cf/17048873976.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06c3a58455---kigumisiwo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f0939295d---94349962643.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/8bf70e7c9f98e66a660de3eaac63b3fc/27617205392.pdfIn PDF document text
    • http://horizonpestservices.com/userfile/mapegujegisun.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_off0000efaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAF 17392 bytes
SHA-256: aab6743f518afc72595cc903d5d2313244929231add2afcc2757e0ceef68ea7e
font_01_sfnt_off00011d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D20 10828 bytes
SHA-256: dd8b83475ec011a9d886ac51174e986f899e21c7fabe92c40b0cde2ce543193c
font_02_sfnt_off000135b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1