Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded0e1466bc4db82…

MALICIOUS

PDF

85.4 KB Created: 2021-06-27 19:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e1994c1110e33615db2fffe1a2b55426 SHA-1: 61c9a17ac6f1db90446cb23d441c20a39c929fd9 SHA-256: ded0e1466bc4db826c130bbe9c046a0893453a043f42dfbc634147432a84d3a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or suspicious websites, likely for phishing or SEO abuse. The presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/47343d9c8c369d753cdca33f9b4ba7f1/movuwukaperitufisirizif.pdf In PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/d172228439e6e64aec8bf24add1032d4/38712929563.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/62epmj9pqo7nd59c6ultq2i941/bajubilaju.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/dutuweleletowumonuzipin.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/40642162655.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/6475595306.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/6c5807ad1ac24964d286282dd88195ed/tipujivo.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/nesokivewefe.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607344f585af9---75027047283.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/92787759569.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/vigajazotajokizut.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076772399fe0---foxawosozukuzitakuzop.pdfIn PDF document text
    • http://sns.hu/_user/file/lesokuselu.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/97200676504.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d6c477079b994bd634b4fa71769ad866/kagizuxidu.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/29ote9sdqoeqhjp4l643faub02/madow.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca0e32737e---48023446482.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/48091848562.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609796dd4dec8---17790660017.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/sqaaq03a70hrslor8h1ftsblp9/55388265450.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/352b1fce6c49f17a57713d512b14f2b1/topolisujoxogezo.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/jibixurase.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+diffuse+long+wavy+hairPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2C 17256 bytes
SHA-256: 3724b0610fa78002ad3eae468feac43af9f7f634cc35122febd88ff0026d8656
font_01_sfnt_off00011721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11721 10992 bytes
SHA-256: 73a44293d63d9f177058962248d52ad166fe438fb90bf91823d1efc80629f703
font_02_sfnt_off0001306d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1306D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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