Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fed382e46c4c109…

MALICIOUS

PDF

88.1 KB Created: 2021-09-23 05:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d8bd9781406c358067455dc7f2558703 SHA-1: 7e5cf63622acd191add6ad7edcf9d46039cdffb6 SHA-256: 6fed382e46c4c109ed585deeb78375b191a2fa1375b219ab2ed3a6585ddf7a2d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the structure and embedded links point towards a tactic of directing users to malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=tamilrockers+malayalam+page+3 PDF link annotation
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/tunizojufevavusiriguvuw.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4701256db---22897925963.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///gukigasu.pdfIn PDF document text
    • https://ottopianos.nl/files/23439134655.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/dipalageverirokevan.pdfIn PDF document text
    • http://kanalizace-ul.cz/userfiles/file/jovimoberawuzatupepabidux.pdfIn PDF document text
    • http://skisun.it/userfiles/files/vusodujuxegorut.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/73498718399.pdfIn PDF document text
    • http://pokwuttibut.com/file_media/file_image/file/vitimugira.pdfIn PDF document text
    • http://moristas.com/userfiles/files/75574632735.pdfIn PDF document text
    • http://conditum.nl/userfiles/file/64788887491.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/66h6gsqkfnpdnkf3jn6vb3bsat/10623712463.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1631215412.pdfIn PDF document text
    • https://gestionarival.com/userfiles/file/32795160583.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/letakutexewug.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/22076163221.pdfIn PDF document text
    • http://gespk.com/userfiles/file/vunasevageguwidote.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/954297422.pdfIn PDF document text
    • http://shopphutungmayphat.com/upload/img/files/62777171171.pdfIn PDF document text
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/13472674564.pdfIn PDF document text
    • https://onlinendttraining.com/files/ganezurubifesugobonimu.pdfIn PDF document text
    • https://specializedfacilitymgt.com/public_html/userfiles/file/92250553284.pdfIn PDF document text
    • http://lamay.de/userfiles/file/porakiwofipazoref.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_off0000ebee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEE 10856 bytes
SHA-256: 9a70d2d606f96c0a452c38cfc3147cd2898d845f78c59128b5e521e8ef17140b
font_01_sfnt_off00010513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10513 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D25 20432 bytes
SHA-256: 2c48f9d60ed2eb7c9f8f65c7c02d408fa84bac3ccfd14d30bdde92e2901d061a

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