Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec349815010ff17…

MALICIOUS

PDF

84.1 KB Created: 2021-06-13 19:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a366305a0a6aa629251f11026f1a709a SHA-1: 8fcfa03270a89d9862cf4881833614bac4b2848b SHA-256: 9ec349815010ff174b48f285766fcc826303fbcd9212bfc461e5d62f4f4f6ca3
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ketchas.ru/uplcv?utm_term=super+mario+bros+crossover+2+unblocked PDF link annotation
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/90af601b0cde1abd257c7bfa3882c6ae/xonemegalaziduligozuxemul.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160721e627968b---92184721422.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/b359a56fedee5963ee07413f78dbb925/98121939644.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/52a4b277125506b35f5a03745a0f26d5/pinixexezekifoxamimepum.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/k6nq8g5gfotnkke30qvji8hon6/tumep.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/jidetafazedun.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a398eaba362---59687851339.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/53969711603.pdfIn PDF document text
    • http://poorclarescork.ie/images/gopaw.pdfIn PDF document text
    • http://kanstm.com/ckupload/files/lotejoxeni.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/jrcm08a979rr9o7g9ava9midn6/fewamawexogetijeju.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/pugawokivujisuzepokow.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/98vj3mpr005bk5f717uhf51d76/jinesorunovezowo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10983 5720 bytes
SHA-256: b4da17172df717b02a1c38d5ed6cbe5880c7685dbf4e0235d6460c7caf935e92
font_01_sfnt_off00011cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDF 11284 bytes
SHA-256: 048f95a7bb18cb8f1be4e8d81e596d2d91c2e139cca252aadd63f52980681899

Open this report in the interactive analyzer, or submit your own file for analysis.