Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b2ab7aa219ee81…

MALICIOUS

PDF

80.6 KB Created: 2021-09-16 02:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f67da4f48503566fdb72549387e8ce31 SHA-1: 2a1c83cf6181c73b95e430d01580b2a2f6cf0f35 SHA-256: 06b2ab7aa219ee81fc273185362d1abe34dd138a9131e5c86110192d295c3eaa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://fotobolfestmeny.hu/mvc/userfiles/file/muwavapimo.pdf In PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613d6f5d7c9f1---69300285706.pdfIn PDF document text
    • https://masukpt2.com/contents/files/27717311944.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/71993300760.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/44450145318.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/35095626109.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/misafigogo.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/17644274161.pdfIn PDF document text
    • http://studiopiergentili.it/userfiles/files/raluruz.pdfIn PDF document text
    • https://keluargamimpi2.com/contents/files/jumudiv.pdfIn PDF document text
    • https://rajnnuhiddje.se/userfiles/file/27015931833.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/21887357815.pdfIn PDF document text
    • https://projekt-lesen.de/userfiles/file/vubolotegubupabu.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/lifobodirapujiwuj.pdfIn PDF document text
    • https://zlato-invest.cz/upload/files/75411109964.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613f2b97e2b39---kazokevezefekedefasadave.pdfIn PDF document text
    • https://univerosg.com/ckfinder/userfiles/files/dovikutegusitimivuneg.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16139ef0c90acd---77447581829.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/52117753715.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/41416074618.pdfIn PDF document text
    • https://tworaise.com/userfiles/file/turelu.pdfIn PDF document text
    • http://thebodyclubonline.com/userfiles/file/muxigavumagazovok.pdfIn PDF document text
    • http://dichvuhieuchuan.com/upload/files/xosawirikifularuguf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=where+are+text+message+photos+stored+on+androidPDF 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_off0000d543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD543 18084 bytes
SHA-256: 56b7f9e6c0426c4545b979e6382358df0110d784bd3fd2dc519dedce12c50b35
font_01_sfnt_off000103dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DD 10888 bytes
SHA-256: 93448ad564a4dd01935b20ce46b91d3297b8406661be5ad6473611e1577be303
font_02_sfnt_off00011cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1