Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd204bea7434fe0f…

MALICIOUS

PDF

78.3 KB Created: 2021-09-13 06:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: a73f5b962826eafd3ed5ab4c72b209ae SHA-1: 556228fad3a5a405f104c1d956b8a570d024e222 SHA-256: fd204bea7434fe0f1d867fd43dce86d24296031ccd8ad32167f71ecdfab15d22
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous embedded URLs, many pointing to potentially disposable domains, suggests a phishing or malware distribution scheme. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with known techniques for delivering malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://alsultantrading.ae/userfiles/files/zazurexumugatesevemewuxin.pdf In PDF document text
    • http://meta-min.com/files/xiranesuwilezoze.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/2194519956.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/bivixomitelu.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/7593148424.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612fba0c271e7---97590347545.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/pinikafegugofuzigiwowo.pdfIn PDF document text
    • https://mcq.bmtinhoc.vn/InteriorWeb/images/images_news/files/95397336767.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/40822923674.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210912085851.pdfIn PDF document text
    • http://hissekurban.com/resimler/files/kasurodif.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/91115295751.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/kikevokadixelekaroza.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/70597317370.pdfIn PDF document text
    • http://www.ktgroup.co.uk/ckfinder/userfiles/files/losigof.pdfIn PDF document text
    • https://dananeye.com/uploads/files/202109082048389946.pdfIn PDF document text
    • http://www.pics4us.de/userfiles/file/49355020152.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b271d3706---subux.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/23329225177.pdfIn PDF document text
    • https://indirimlipin.com/calisma2/files/uploads/zujez.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/gakawixu.pdfIn PDF document text
    • http://rovitek.com/userfiles/file/wevinatutovogujekatatevaw.pdfIn PDF document text
    • https://gazeta-msp.pl/user_files/File/munetarevufawibelejaweri.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/mewezorularasivezadijolu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=magic+3d+gamePDF 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_off0000cbe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE9 18400 bytes
SHA-256: 23dc9ea7ec0eb18abad8955f1a5fb1d2dacefa711415e7aed37053360c9c8d18
font_01_sfnt_off0000fc81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC81 10240 bytes
SHA-256: 4ff4477d10f45a2fd6c267a85145e9c36d65d3b768618e1f413a354e3f358223
font_02_sfnt_off00011359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11359 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1