Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08786e7db41a888…

MALICIOUS

PDF

74.0 KB Created: 2021-09-07 14:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 457be46d02fedfeb7964792f8239cc5e SHA-1: b059436da35827da026b5ac60803c7f8a5855465 SHA-256: a08786e7db41a88826a9eceaabea907f3e15a6d062cc05861d092a7b9e118651
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links to external websites, many hosted on compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://bloomx.com/sites/all/sites/bloomx.com/files/82504673312.pdf In PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/t03ajumpqh600fp74a1k8n98j7/gegufirasevavejivud.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/50jqs3jpql7s3ftlkjq8aksolm/13124843548.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/80191337957.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131ff663ad1e---27056380949.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/ca13f95cac353edcd9a5c5c4ef95edf4/13947070208.pdfIn PDF document text
    • https://mokshadhamnepal.org/userfiles/files/6111889040.pdfIn PDF document text
    • http://simsvizag.com/contentimages/file/10680312744.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/fiwutudegitu.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/jl9kugn28flhocf3f5n3gr5m7a/62819546855.pdfIn PDF document text
    • http://indovinandoilmondo.it/themes/userfiles//files/junitedujisabuko.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/rixalokikinodofi.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/559c78f7ff376681ecbda38828684b3f/zedewebomokakovop.pdfIn PDF document text
    • http://studioarchoggianiepartners.it/userfiles/files/1432440135.pdfIn PDF document text
    • http://soupworld.de/upload/file/80130254668.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/pozojajitujifojo.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/25ba7fc69a68afe8db0445e95b4f9eb8/disasupijerugi.pdfIn PDF document text
    • http://anduong-nhatthanh.com/uploads/news_file/matipudafanemixetir.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83fce5e346---koxuwizobakugumulevuda.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/mexorerimizaneguvamon.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/vogipopatum.pdfIn PDF document text
    • http://retailcop.ca/files/46718711131.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/60248614585.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/60425712890.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=fade+to+black+piano+sheet+music+pdfPDF 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_off0000bd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD1C 11096 bytes
SHA-256: 04dd3b346f3ca755a7a7dd64b9fc021028881674c1ab9ca2f8ad55f550a0b94f
font_01_sfnt_off0000d67b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8D 17168 bytes
SHA-256: e6d001f24493c3e3d89791cbf7ed0f5e58ddb4d9f85137123d028f10f090709b

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