Malicious PDF — malware analysis report

Static analysis result for SHA-256 547679ba79e218fd…

MALICIOUS

PDF

69.9 KB Created: 2021-06-06 10:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5bc4009df74a59560c2c1bea7a83c163 SHA-1: 297af04d2126613ddca463e5566085499a836931 SHA-256: 547679ba79e218fdb10b156a2441c3915a3febbd1e26b552e5fbd787fc5ae9bc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It functions as a link farm, directing users to numerous external URLs hosted on compromised WordPress sites and disposable domains. The presence of embedded URLs and the nature of the heuristics suggest it is designed to lead users to phishing pages or download further malicious content.

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://cructi.ru/uplcv?utm_term=does+god+answer+our+prayers+hinduism PDF link annotation
    • http://mywayrtk.info/userfiles/file/filavewagax.pdfIn PDF document text
    • https://xn--arbeitskndigungsrecht-best-5zc.de/userfiles/file/85237636895.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b06d6608408---woxofojogezabuwomutenud.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/bedodebiri.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/a3aee611747c530c8a370c43aa6f3b64/56318811811.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/beedebbd1f0b2c938fcea446a10de561/modadovonelalanibunetoj.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079d4f2eca2b---novixumepifuruxaxuj.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072828eac721---wubejovot.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/19381dd9beef642d863d4322c29f7833/54511039533.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/musatowofasubimuvukene.pdfIn PDF document text
    • http://aps-mes.com/files/file/sugulotopujudutizefubig.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608acde56731a---70478271286.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/iegcl0musl8j8e87j068oh95f3/jupaxajiratiwokoporebu.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/2452837df92b92a5bbff2c7fe8f81ba3/sizujefukefogofut.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/tue0nqk59d3f31s2m9knhb8lnv/nojojoxiwipelexudi.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b01e128ba4e---bulapujim.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_off0000d452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD452 5536 bytes
SHA-256: b797da25e333e80095d9a03222e680456ea23fa5e34c969987ee4cfb9562f80e
font_01_sfnt_off0000e71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71C 10400 bytes
SHA-256: 3823d7d4386d7a808e8961c8608726641757dd3540af53e8838a3f2ff38d9dda