Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47743f722855aa5…

MALICIOUS

PDF

68.2 KB Created: 2021-09-20 04:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 59a0dd043d9fbda86c512923036fb849 SHA-1: ff9e2ea3fa1ca02a3e49c75e66df2736eef2fb6c SHA-256: e47743f722855aa5746fa8d688819511bd5556cbcd22f158b9d94d3570be6965
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics confirms the link-heavy nature of the document, likely designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pixomot.ru/uplcv?utm_term=gta+v+cheats+pc+controller PDF link annotation
    • http://www.mediagrand.hu/data/editorfile/xorikuvimavedifuni.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/5839857820.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3bd0dfe25---tisaxaxuzoboj.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/mefuzozokutal.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/wibevinabumusupo.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/126866abad9c3d1aa6bb8816551984ce/15953480779.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/a3e634720e78f3f77412b252aefbd913/bigufesopuxawuw.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///fepeveb.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/lafijoran.pdfIn PDF document text
    • http://masterref.ru/editorfiles/file/vepegusenoxala.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/4e3d21b96dbb5286f60e4ea879b0f56a/vugepebojal.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/32996787145.pdfIn PDF document text
    • https://beauti-full.ru/uploads/files/94892810357.pdfIn PDF document text
    • https://melz-feu.ru/upload/witev.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161412e2b96a7c---pixew.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/garesidobepofid.pdfIn PDF document text
    • http://tehpromyar.ru/media/file/jaxotuxekas.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_off0000ad8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD8B 15060 bytes
SHA-256: b362ad0f2a5876419e03def9c2119d597c98f63f99f03ec0a1e647ec549a1d4d
font_01_sfnt_off0000d3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC12 10484 bytes
SHA-256: abc214cf99062fc7a1b18cef38a5e771cc3776b9ee6e62a17232169fd869719f