Malicious PDF — malware analysis report

Static analysis result for SHA-256 8baa8bb4dcb8c902…

MALICIOUS

PDF

87.0 KB Created: 2021-06-14 17:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2fff021bd7da3d15513a5c9d2af07c42 SHA-1: e15ae245383abc70ce2f72da057a2025df9ae5e3 SHA-256: 8baa8bb4dcb8c9022e6d1206708f908dbdf61af4cc1c23eb8e8eab61b5b461bd
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document contains numerous embedded links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to direct users to potentially harmful external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://catamma.ru/uplcv?utm_term=transformers+the+last+king+full+movie PDF link annotation
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a858b938082---tilagubokuvafobutitiba.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093982c608d3---rilaxexupew.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/gimumixipe.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a545be0d95b---simanapugipoz.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/3cb77d665c92469677d62977b970ecca/30127358697.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/506e5sgmcrsj23rtnql8dovbo8/damirol.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607163c0e67ba---degugusebazoxiko.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/3b69702c3fcc1e9929a3c45d76593918/vekazujow.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c89c14a29---kevelebidofowavesedir.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/20344808655.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c73105bd219---19342654701.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/57549356806.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/881438fc21a8d6a0e0d7b36e41b7432b/48210373317.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/bokuzagatoxorujekuwoxe.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/26917176617.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1606f806c6e981---dopexatok.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607c21ebcb491---27563993487.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/n5qnjc4udmqr8tfnkggpppde00/51846922563.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11578 5256 bytes
SHA-256: 890065fc9f09db83eb5bb7fcafff8e250d0a42edc39ad71531e1fb130dbb3026
font_01_sfnt_off00012732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12732 11864 bytes
SHA-256: 31ad2ebc83db416da44f0328efbef3b4869a70c7f13fe75743ff18737dc8c420