Malicious PDF — malware analysis report

Static analysis result for SHA-256 f75231b3a8220656…

MALICIOUS

PDF

82.1 KB Created: 2021-09-01 00:27:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3ce8440bcc9b928cfac1ce2aab40227d SHA-1: b8c909f4bd1033b1d4cb65966d43d4502f1ef80b SHA-256: f75231b3a82206565cc83e2ffb72af18c0cfeb6c8aef652eb46c6351763f048f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other potentially malicious sites. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/3qdvrsn60dl97fk8rcp3hc6np2/11932308589.pdf In PDF document text
    • https://champion-osk.pl/userfiles/file/25103057407.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/16441597729.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/68412173050.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/57b7ef498901e686aa4e4dd36d57c410/11612489134.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/83649201297.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/botuderusubetugogirobax.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210814232010.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/vopuwozikuludinisore.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/idmef1jgsdbtq6lgo4b2rqpnc1/sofanifevu.pdfIn PDF document text
    • https://actorconseil.com/files/file/46274380203.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdf294bcb2---82233909441.pdfIn PDF document text
    • http://bayanairag.com/uploads/userfiles/files/71311166406.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/dideputopelos.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/hibll90jlfc8vku43e23sdp437/dusofirud.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/qpi3d13sjqlsisnsovql44jg5d/detofepimelilazisasopila.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3bd6ae1018---tofogivis.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c1be525b55f---jeviwido.pdfIn PDF document text
    • https://ou-ravda.com/ckfinder/userfiles/files/konowinesimifese.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160713366c706a---78392819069.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/cdb5e75469a5aa8afae687cc4e853be5/gumepebikida.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=sapporo+yearly+weatherPDF 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_off0000d793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD793 10260 bytes
SHA-256: e6b6899a68a2d5893cdce63b001d3468af71f6c6d9dcf66edda15fe4ea985fbe
font_01_sfnt_off0000eee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE2 19020 bytes
SHA-256: 2d40092d024e63dbcd1d0045beea90b16d5db701fb5ce6d59765e7d9157ee13e
font_02_sfnt_off00012049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12049 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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