Malicious PDF — malware analysis report

Static analysis result for SHA-256 048ffb2c45756c0a…

MALICIOUS

PDF

72.1 KB Created: 2021-09-21 03:06:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b4f9cc101430b2e3888bf3d61559ad1f SHA-1: 69af1a69d5b79ac62d3edc81a9a7eb2eeed4716f SHA-256: 048ffb2c45756c0ae0f9a4478e23d83e4f78e2317ee282135d7b7893ddbc935d
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are part of a link farm. The ML classifier strongly indicates malicious intent. The embedded JavaScript likely facilitates the redirection to these external sites, which are used to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • 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://www.startbatteries.gr/ckeditor/ckfinder/userfiles/files/bilodozimim.pdf In PDF document text
    • https://avigailpekelman.com/sites/default/files/file/rudiju.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/62476179945.pdfIn PDF document text
    • https://apskarota.org/userfiles/file/rofije.pdfIn PDF document text
    • http://lamay.de/userfiles/file/vefetef.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/2520135813.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/soxudakebudowujikugeza.pdfIn PDF document text
    • http://shiraz.sk/ckfinder/userfiles/files/89087038380.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/15457442461.pdfIn PDF document text
    • https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/47792989230.pdfIn PDF document text
    • https://estoniapools.com/contents/files/25648111609.pdfIn PDF document text
    • https://inprovitbrasil.com/ckfinder/userfiles/files/nogogigu.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/tajawit.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/widowonemeribelamomoti.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/33202557795.pdfIn PDF document text
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/pejaxe.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/7941232261b46b2013027244289c870d/momovoli.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/8941758341.pdfIn PDF document text
    • http://riviera.az/userfiles/file/tazijusegari.pdfIn PDF document text
    • https://wecareprogram.org/images/file/lelame.pdfIn PDF document text
    • http://crediramasrl.it/public/file/51095769603.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/95684134000.pdfIn PDF document text
    • http://classiccar-jp.com/js/upload/files/kifozixofo.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/tuzexopumosuxato.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/40276085828.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=the+last+house+on+the+left+full+moviePDF 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_off0000b687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB687 16964 bytes
SHA-256: 6f7d4c6d86ccf61fbe1d1668c8e2a6756958adbf9bf9d0ec9a36c71579ac53fe
font_01_sfnt_off0000e2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE3 10508 bytes
SHA-256: da5644e5dedaf396f2c7609590139a923a52edc67f44c89a7a0af82a5d02fdb5

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