Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbaad8220cf54f77…

MALICIOUS

PDF

66.8 KB Created: 2021-03-22 22:29:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 6c9e0ed71665da266a224b878dd8ea2d SHA-1: 6d2dac85a410313be29a64d501bbe66b33576f22 SHA-256: fbaad8220cf54f7740677e4d084688e433254496b89069e168ab36337ba455f3
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a link farm, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=its+everyday+bro+roblox+id+code PDF link annotation
    • https://cdn.sqhk.co/kitujesijak/c6gjEgd/zavoje.pdfIn PDF document text
    • http://meetsalle.xyz/descargar_internet_explorer_9_para_vista_gratis_en_espaol0bfrq.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/jd0Yihf/88743438400.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500417/normal_6014ec7a70f36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494681/normal_6039615e0602b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369630/normal_5fe019fa68520.pdfIn PDF document text
    • http://specrazreshenie.com/a_days_wait_analysis_themem3ity.pdfIn PDF document text
    • http://twitter-center.com/husqvarna_snow_blower_parts_for_sale8ilf4.pdfIn PDF document text
    • http://crispyset.online/sivegojanozomowu3uhd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482002/normal_5ff354a77615a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501057/normal_600066d433f6d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://20128683-61eb-4207-b985-d468b1a81fea.filesusr.com/ugd/0049ca_4265688b702f4d28b75ff331ce993d6c.pdf?index=trueIn PDF document text
    • https://ddb281da-11d2-423e-b83a-408ecf1f607f.filesusr.com/ugd/9db61c_ba61cb0f72b6489ca7d0a0c60b1f8f48.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wewiro/xagefevuberozito.pdfIn PDF document text
    • https://29ca30ec-7ad4-487f-8637-d2d67f3a323c.filesusr.com/ugd/10b11f_5ed3f7183d5a4e548283d6d48a8126c9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sasufufa/95029208514.pdfIn PDF document text
    • https://a804c8a8-fdf7-4fba-b19b-c23aecc29597.filesusr.com/ugd/a7074a_6179e399912b44ed84ed65db2ced85bf.pdf?index=trueIn 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_off0000c736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC736 5240 bytes
SHA-256: f3bb8fd8459586e6f6584047700945a2d4aa664ff56f4f665642765e351bad8a
font_01_sfnt_off0000d921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD921 10484 bytes
SHA-256: d04c177dda2416013be0fa5745e5f5bd031f0a64c323445517a0794b5806a0ae

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