Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea9edc663d8f0ce…

MALICIOUS

PDF

72.5 KB Created: 2021-09-15 20:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 76ec84f7560092c55e9c1cbe322f4f1e SHA-1: a7aa6f6a25d6b1cfa0a732b75ed7c70870a826f9 SHA-256: 5ea9edc663d8f0ced2abcffffff73c441de7708ae71b9d3df69cf2b5f2902124
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other domains, likely intended to lure users to phishing or malware-hosting pages. The presence of external URIs and link farm characteristics strongly suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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=just+add+magic+season+3+123movies PDF link annotation
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139bf9d96be2---xulalerimovepeputufajiw.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/72ec04e784332b6443db473f7bcbebd3/jiwilavelan.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613125f23d3da---43084700559.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/24831112458.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/81290993607.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/76851603236.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/8185083141.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/e3e9ca4548e4461e8fc2a6399cec4143/45554055214.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c97f08f55---noripupomutukap.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/rukufepi.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/vefodotanini.pdfIn PDF document text
    • https://haruhonpo.com/upload/haruhonpo/files/19466809475.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.info/upload/files/66545898073.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/uh0d183hgdjtvs1k9vj65skt2q/mewedupajasa.pdfIn PDF document text
    • http://elpijisystem.com/file/duzodi.pdfIn PDF document text
    • http://insureavisitor.com/userfiles/file/berujivotupanufu.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/31651554646.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/davaru.pdfIn PDF document text
    • http://www.benyowsky.com/resources/files/fewifukawenipebekubino.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/36717849584.pdfIn PDF document text
    • http://lauraestetica.com/userfiles/files/44979814027.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/81431291205.pdfIn 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://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_off0000b92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB92B 16236 bytes
SHA-256: 422a88e943f71044ae617c69d00e880c145c12182a238c4d4d2f8a5ed1cd91ff
font_01_sfnt_off0000e2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DC 11068 bytes
SHA-256: ea72111d4e7a2d68246bcb0bdb7716591cdcf081b72f7db615f345c1bb407735
font_02_sfnt_off0000fc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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