Malicious PDF — malware analysis report

Static analysis result for SHA-256 e03e209ced4705cb…

MALICIOUS

PDF

77.7 KB Created: 2021-07-20 19:02:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 89ff23b5f6949b5b08e74fd4d9d55f73 SHA-1: 597602755f761b3017cb3e0524a09a0266f1e3e9 SHA-256: e03e209ced4705cb8605e862fe0e752cd62baff3c12b692518be9dc6837f8e82
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to exploit users through deceptive redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://retroldn.com/userfiles/file/6526969301.pdf In PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/32e1e6c633fdadf355f73dfb7c0fca45/dekesutuponimukizabewur.pdfIn PDF document text
    • https://webmenuplus.com/images/file/23389670063.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/veaq1j6ob323euof0v8sjegi84/50334732379.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/kilagojeletixakujetomogol.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/0fcbd0ac71d55b20a4690ce6970a6ec9/jubixubexejomijinut.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/a2d570f083b98476d58fd2eba5d8effd/38193833756.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a305beb0dae---porawadidegavugufav.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caa8c034f4e---famirubekapudodi.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e9678629a---darukolo.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9d18fdcba923ebf7b9e96f42e3628621/mupimukibofabotezapidi.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/96796483278.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/3u29ee31pi4g3vpmv6i4j84qh4/guvutowusuvoz.pdfIn PDF document text
    • http://riversedgefm.com/files/file/falalakakela.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/m1bnjvgp5lq5s8c8khl3kj3cq7/nagerot.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/en3q0b76i6cg9m26gujfrpq9e1/78112444415.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e872644ba.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/xemitirabanefafesosi.pdfIn PDF document text
    • http://teifsepahan.com/files/file/8621721030.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/5a5a45cdb704a2cb2d398e02307ac4dd/getewixekoni.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b82c1138d4d---58484830638.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740ca6e542c---nanimerodasu.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/65938763565.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/46045082145.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=11+aside+football+pitchPDF 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_off0000cd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8F 16844 bytes
SHA-256: 7760121e185326668b9a4f7a579e8066d40d75f4a5d60c4caf096b4699a1e3a9
font_01_sfnt_off0000f99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99A 10608 bytes
SHA-256: c0328e942ed8fe7fba583ac40fdf50d3041dff8a8dd94f0928faebf58636905c
font_02_sfnt_off000111c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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