Malicious PDF — malware analysis report

Static analysis result for SHA-256 054736add7908902…

MALICIOUS

PDF

84.5 KB Created: 2021-08-18 06:38:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 530c46bb23f19885635e5ad024ca2862 SHA-1: 710525fc9178ae13f519e5804665f9b3df075d1e SHA-256: 054736add790890276b1a11b04dc29e7e2aa06d35f1a1999875286003c70c78a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites, suggesting it functions as a link farm to redirect users to potentially harmful content. The PDF structure and embedded links point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16087c6191fdd6---21520227503.pdf In PDF document text
    • http://cpgny.com/userfiles/files/53952419143.pdfIn PDF document text
    • https://fasaac.org/temp//files/21960577818.pdfIn PDF document text
    • https://ksmt.edu.np/assets/ckfinder/userfiles/files/pasupumugitijupasax.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119a7989fb7f---vafepatijuxobuwurosi.pdfIn PDF document text
    • http://evola.it/userfiles/files/24826722855.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/4db9e68834f1d9289e526daf42076689/44279149703.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcb4e888550---65024909798.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/tanudoxiwezox.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/3a3d833613b4499b382bcb67c0fd4318/22890839299.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091304597ff0---64065602719.pdfIn PDF document text
    • https://hotelpancharatna.com/assets/userfiles/files/65716448322.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/19442484137.pdfIn PDF document text
    • http://greenhousehotel.vn/uploads/image/files/1660581337.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/77548351987.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/8304f8cd547e0f424691ee352a02cf9d/fatexuzobononujuz.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/ed22e4b621565b6f70fa1303a989975b/92967144078.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877dffd1aba---3531537356.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/38c8e77ab2cd3ab53122313c64e16d2e/94687070616.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/6b61e3178c4ec3e86aea0f35fb470015/wikazotipejugifolane.pdfIn PDF document text
    • http://hasyo.net/files/file/70018213677.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/013959d46970749a57c00eb79fe13dad/48847136538.pdfIn PDF document text
    • http://www.papelerialapiceros.es/ckfinder/userfiles/files/30474296704.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=what+is+mercedes+pre+safe+systemPDF 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_off0000e6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A9 10724 bytes
SHA-256: 96d12e734fbc8bbf8f856c67d665c82045c43f9d55589c2cdd4962ada7ed01d6
font_01_sfnt_off0000ff54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF54 16896 bytes
SHA-256: 3e02390d9ccaf184d6478a7defc4c860813aa6eecceeaf4cd62e9a5b81dc9a52
font_02_sfnt_off00012b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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