Malicious PDF — malware analysis report

Static analysis result for SHA-256 3feaac14d0668164…

MALICIOUS

PDF

86.3 KB Created: 2021-08-25 09:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 7e407bdbc09b158b7af1c2dfd835ffd1 SHA-1: d9cd12f6242b5eb16ccc3d7d7239b1d7c51fb4cf SHA-256: 3feaac14d066816440a196af6bc23c6c131bd4efe15ad1abe2d2f8dd2aff06ec
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to various URLs, many of which are hosted on compromised CMS upload directories. The presence of numerous links on disposable hosting and the use of UTM parameters suggest a phishing or scam attempt designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e27c697ec9---13298434047.pdf In PDF document text
    • http://textingrights.com/userfiles/files/71131464722.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/dcc089a04f15570a05d39886608c7c2f/zejixenunudonalero.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/17298240942.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102c4beb7139---71850888430.pdfIn PDF document text
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/vogitodizatonorifozafubob.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/cd74e8291881b6e71f57a5d3ee0966ef/83268367902.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/3236762167.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/zujutes.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/026b25337661c654551ff62b4cd90251/3945019519.pdfIn PDF document text
    • https://vydavatelstvoklett.sk/userfiles/file/53382235151.pdfIn PDF document text
    • http://streathamtaxi.com/survey/userfiles/files/subixopitikakawibodugadis.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16125718e939b5---segupibasorogap.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0736053001622963989.pdfIn PDF document text
    • http://expresskaliski.info/file/57686205123.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/21c2bc49519f2e92f535716e29400370/38430499309.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b87f7a7990---14443070423.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a43509d0a7---besodiruvufobip.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c178b7c5e2a---taxufo.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/63278351856.pdfIn PDF document text
    • https://nvsrolko.org/ckfinder/userfiles/files/35332901102.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/7j36brj9d4p8b8el7qkfhk0np3/83829981318.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/37545321331.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/12015015754.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16089f9cc88d9f---43158660631.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=there+is+a+demon+lord+on+the+floorPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B1 6328 bytes
SHA-256: 6e0b4090326ee690b8c231ff6939315a18fc167a6c2642f2d5221358aad2e3b1
font_01_sfnt_off0000eb62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB62 17532 bytes
SHA-256: 24847e762fecb5646e385fd278e63007eec8f5a4eab2b02c51971ad3030b2a40
font_02_sfnt_off00011926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11926 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001313d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1313D 10584 bytes
SHA-256: 52706bcec85c3fa860fb87cbf6cdf17d28e92366dad2d97a9b4037c8a9dc5c9e

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