Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9295be09b56b12a…

MALICIOUS

PDF

81.9 KB Created: 2021-09-20 02:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c5f1997cdca1fec630670973b5207a58 SHA-1: 439a11772cc120875daecc36a32f3d7badfb49a6 SHA-256: d9295be09b56b12a75b89e140f172bc1fd4ea3d37a3e112b6cdc7a9b62f50ecd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm directing to numerous websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://brianhaymore.com/images/e/file/pazunatiwepumapijusokefa.pdf In PDF document text
    • http://marketingnews.fr/images/file/xufujinizafizofexodi.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/mumekaxorovebugumokodi.pdfIn PDF document text
    • http://surestegc.org/documentos/file/21040421273.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/zoposadokas.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/dixiputefagaxumefu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147bb869f2b7---sulepatujizot.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/161334a117df1e---meragipasamox.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/22182948632.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/furivajop.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147abf9f211a---zabivolobatimagu.pdfIn PDF document text
    • http://studio5r.com/userfiles/files/82393705584.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/97475564185.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff0b4cb1b7---tabipo.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131f95176d2d---serajefaporamu.pdfIn PDF document text
    • https://cs168.tw/upfiles/editor/files/55063860295.pdfIn PDF document text
    • https://shidoremicrosys.com/media/64221711453.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/97875097080.pdfIn PDF document text
    • https://aljazeerahdrilling.com/userfiles/files/98597377201.pdfIn PDF document text
    • https://b7b.reviewz.eu/app/webroot/files/userfiles/files/jafiwavariwelimox.pdfIn PDF document text
    • http://rovitek.com/userfiles/file/migolorik.pdfIn PDF document text
    • http://123podkrovie.sk/editor_uploads/files/56131370310.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=sinhala+karaoke+songPDF 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_off0000dac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D2 18692 bytes
SHA-256: 95c7b228558cd0ece719313e0d82c13daa778592cd50ae2c5c73f4017853f415
font_02_sfnt_off00012346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12346 10456 bytes
SHA-256: 1a2902041227dea92a191218b7f243ca2adc7215d3a50ce2a5773495dd0fd84a

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