Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e94b17acd1f18c9…

MALICIOUS

PDF

77.9 KB Created: 2021-06-07 02:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c1811105c7c579bb5fc7f58111fdc492 SHA-1: 67f9b99e601965cd026fb63b5834d8c9e0a75da3 SHA-256: 5e94b17acd1f18c983474d5164ad67f69993321bd96e6595d472f42828b8ad94
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs that form a link farm, directing users to compromised CMS upload storage and disposable hosting. The primary purpose appears to be directing users to malicious websites, likely for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://ketchas.ru/uplcv?utm_term=how+do+you+play+mahjong+with+3+players PDF link annotation
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/1b228bb108731d60a614d0276de5cf3d/98233961668.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/g0kf1oce1gb6mj61flbs18jfkr/97342599680.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986f64c4823---30389339077.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/deditutowuv.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b7abcea4d68---godovulaf.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acefa3e7f7b---83596464025.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/8cbce26b21af22c736d15d8c8ae7a0af/90310131855.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/e163b9ebf5f3f38b8ef59e3b9fb9206e/58210821847.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/d086a362d090af91fa68c07e126e7c6d/25975582604.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/jtt7392q1va99ejslvuu7utfpc/lalutarabupagir.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e35d1d1f8b---gulimez.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/141e9e043830ed128ed5332237d09fe0/31853605231.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/273a876feb7dea201cc897a121143530/19416030539.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/57849847713.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608127b615f25---nisonosudugizivipexizil.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607596ff1eb53---latuduvexufip.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/a0na2cpd4aui9er8qv2gvff4ts/ginagibesibovutizuderor.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b1411979f4a---52425257259.pdfIn PDF document text
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/el7lcimgoutmmq56gq67666v6q/92765902001.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AD 5652 bytes
SHA-256: 71d12a0fc281ace9cfeb7d626c19351289966838a0db9d5d468d94f82e1ff82b
font_01_sfnt_off0000f9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D6 10332 bytes
SHA-256: c4dcd07b81b018b06fc2aa87d0a351398ba52211097b9a8d3615c2c453e1928f
font_02_sfnt_off00011cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDF 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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