Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca3cc56c13ab4de…

MALICIOUS

PDF

80.0 KB Created: 2021-09-17 16:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 66aebc1a093e3ce3482a6e6b8a64a903 SHA-1: 1ba7666bd0d326e64d237551752111f881e7ec65 SHA-256: 2ca3cc56c13ab4de8b7f5be96135058041a59602c6d98c154bb8b2b89a095ea7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous URLs pointing to various websites, many of which appear to be compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://chcial.ru/uplcv?utm_term=face+swap+in+video+android PDF link annotation
    • https://jagamimpi.com/contents/files/83031019757.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140c4da36420---gilufut.pdfIn PDF document text
    • https://lesrimaudieres.com/images/uploads/file/mulilumanumemurexa.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/28560104866.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/3a60d544fd06bf2c703ed194e4888063/97663903928.pdfIn PDF document text
    • https://ezsprinting.com/userfiles/file/56691014043.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/belawezikamisikirulevuj.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16138b1261d0f2---tewebedavimawujemuk.pdfIn PDF document text
    • https://concurs-euclid.ro/upload/fck/73395655418.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/26542328914.pdfIn PDF document text
    • http://pactolous.hu/upload/file/93193346102.pdfIn PDF document text
    • http://marmaraisg.com/images_upload/files/26893903030.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/retorogepaxufedi.pdfIn PDF document text
    • http://ladna.pl/user_images/file/86087573228.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/8297352101.pdfIn PDF document text
    • https://matao.ro/app/webroot/files/userfiles/files/15428467824.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/xakobadazitufeki.pdfIn PDF document text
    • http://allefrgycg.news-read.com/upload/files/73260838892.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16135bb0d58e61---68327183525.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210910_4581B6A5CD97340B.pdfIn PDF document text
    • https://collinite.pl/userfiles/file/54908183914.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/vitiwige.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021091005043696.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/37291306051.pdfIn PDF document text
    • http://screen.by/images/file/61004904703.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210914061232.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/68407209578.pdfIn PDF document text
    • http://lrm.mcdonalds.ua/ckfinder/userfiles/files/jemefuketebeka.pdfIn PDF document text
    • 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_off0000d51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51D 17316 bytes
SHA-256: bb0af14689f4109bc996bf3ea0f8c0c1c7113d21586550d05554303df94fd54a
font_01_sfnt_off000101a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A2 10492 bytes
SHA-256: 0b89127a54ee5d594f5ffec9b51d2ae70b6ff2ffaa9213d20eed6afa88b2440a
font_02_sfnt_off000119a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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