Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08be46148aff41f…

MALICIOUS

PDF

79.1 KB Created: 2021-09-04 15:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: fe27b06117f3ff27d27508020e1c0183 SHA-1: 704aa36dc6ed9585383ae523f4bc3b612a1708a3 SHA-256: d08be46148aff41f71cf72b76a8c9a869a36e85888c7370771675c1cf841c1d0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. Heuristics indicate the PDF acts as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://deltarealestate-eg.com/userfiles/file/13061884187.pdf In PDF document text
    • http://timavoshipsupply.it/userfiles/file/17834357292.pdfIn PDF document text
    • https://sona3elkhair.com/userfiles/file/17346340188.pdfIn PDF document text
    • https://globalquestconsulting.com/userfiles/files/49568989074.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c786f12ff---61077266684.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/lapugawixepikibojisa.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/mejuvipodirokuderutenive.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/desalufulafutigirutano.pdfIn PDF document text
    • http://netpost.vn/upload/userfiles/files/xawajitojigezotug.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16095af8a43535---lexixonuj.pdfIn PDF document text
    • http://fabtur.ru/upload/files/dumolarujo.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb5cf767f3---4323029759.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/544567607.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/dofofape.pdfIn PDF document text
    • https://rajakedua.com/contents//files/munuguduxopotanigabun.pdfIn PDF document text
    • http://richmediahouse.com/admin/uploads/file/34067120927.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160ad94c3e0581---63327261620.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bab9597f7bf---65335029442.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/dc52c57cb0d54e7c492b362e3f15b23b/93868070019.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/90690133861.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/f933c919d25b267eefabbeb647bcce27/sotororafete.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/48da3ec3fb73045cdab7c7ce2d6e215c/sukogenomevifenikisizave.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/95891594209.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=mga+antas+ng+wika+pdfPDF 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_off0000d545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD545 16276 bytes
SHA-256: f76252424de90f22b4f0e2dabe5877493ca4e7b57241a3b7b178f47d01b67c9a
font_01_sfnt_off0000ff6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6C 10448 bytes
SHA-256: 69d685c7d5c37c3365a1b78d28e8ecb324c8628eb5568606340d7cab26494297
font_02_sfnt_off00011720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11720 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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