Malicious PDF — malware analysis report

Static analysis result for SHA-256 201995f20021d40c…

MALICIOUS

PDF

78.1 KB Created: 2021-09-13 05:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fb6137d610826accb995906be7745651 SHA-1: 9a66609427ff478ed0b8591f4ebe237f00ca1ef6 SHA-256: 201995f20021d40c500d6a40480fafd20639059ee0d4b26bf42bac6daf7be65d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious files. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were directly extracted, the overall structure and heuristics indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16137d0ba17ab0---58063981075.pdf In PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/5r4sk0lf6hh5j9kqhfqdl0lrk3/vuwani.pdfIn PDF document text
    • https://el-tall.pl/pics/file/33258676943.pdfIn PDF document text
    • http://hstairan.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/3067602883.pdfIn PDF document text
    • http://firegallery.ru/img/upload/kejavimatiwama.pdfIn PDF document text
    • http://jadeite.ru/images/file/12686093802.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613506a85930a---85365894267.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613851555ec80---86666800242.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613a60517665f---giwegekuwukol.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/napobosufis.pdfIn PDF document text
    • http://sm300159.agchost.com/userfiles/files/61158053212.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/lalemorakapipajonit.pdfIn PDF document text
    • https://waelfawzy.com/userfiles/file/In PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131b1beea832---10371671037.pdfIn PDF document text
    • https://interconformity.ro/images/file/todepu.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/afda445e8b9756243eb6f56be44f5a00/34654985359.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/xoxesalu.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/zusuwuwevupotanina.pdfIn PDF document text
    • https://cooperadora.grupocreartel.com/documentos/archivos/rusoxuxejoz.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/27e78b7790e76c25d2036701244624b0/vepogiginikewesar.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/161384e6c8ca89---jesunamewuremisutogu.pdfIn PDF document text
    • http://swatimishra.in/uploaded_files/userfiles/files/54679598042.pdfIn PDF document text
    • http://gazetavk.ru/img/file/dibuxanexefa.pdfIn PDF document text
    • https://corianderedmonton.com/ckfinder/userfiles/files/37317798938.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=cinema+tycoon+mod+apk+downloadPDF 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_off0000cd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56B 10728 bytes
SHA-256: 9819faf0ed83b1fcecfb52d019aab6242c5ba7fde7367b42254da4a9528d2c9d
font_02_sfnt_off0000fe20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE20 17312 bytes
SHA-256: c5124e120e88335e1a0d7245c7d4f5968e3515d3c918f2fe331e77ee98267341