Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e057c393a17967…

MALICIOUS

PDF

89.1 KB Created: 2021-09-08 04:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9a686a074d141361bbd7e123f8c720e9 SHA-1: 3c36986b28cb65781c91b220240e1f012e16dd2f SHA-256: 94e057c393a17967ae728f3df460eef1dbae50c6d6a03d14d5df6a07b764ec6c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to host malicious content or redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9999e88a59---8691296319.pdf In PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16127370342e54---77045963439.pdfIn PDF document text
    • https://pracowniatechart.pl/fckpliki/file/fawipasipobowabulum.pdfIn PDF document text
    • http://angeladaniel.de/uploads/files/giletabazajewexirutap.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16124673697127---rexovizusanobem.pdfIn PDF document text
    • http://domplus.su/userfiles/files/63049504429.pdfIn PDF document text
    • https://cristalensi.com/public/File/57702654101.pdfIn PDF document text
    • http://kingsap.com/file_media/file_image/file/wesazagobibefo.pdfIn PDF document text
    • https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/biruvofi.pdfIn PDF document text
    • http://linpus.com/app/webroot/userfiles/files/1700225214.pdfIn PDF document text
    • https://samavetah.com/ckfinder/userfiles/files/69332174429.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9387f8c7dd---12782674139.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/d36e4974c49bf9b6fcda13e68443851d/3020100439.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/rarageruwojakigoxuso.pdfIn PDF document text
    • http://deepakbatteries.com/uploads/file/33738542478.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/8ffc0420c8d4ff94b5a66e65a8555644/78947073302.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/tajokofegas.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/pigaj.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/so13o7f6oupgejhg75avtoe2nd/99420762650.pdfIn PDF document text
    • http://www.520amis.com/upload/files/2314014482.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/r7fj1ueag0as9n6t4scdi5um80/libapigujuwukipefafuju.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160909a6909091---pedigekonujatisajaze.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d911b642e7---kunegoragekerituseta.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/risusiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=karcher+k5+premium+full+control+plus+manualPDF link annotation
    • 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_off0000f2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E2 18784 bytes
SHA-256: b611ac9a07ca9a8355251ecce8e3d779afe09e5f394be28b6fbf1574bf85c9c4
font_01_sfnt_off00012487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12487 11064 bytes
SHA-256: da87e201a97757c3911bbbc73ec44270e235aefa4f6b0392d8c30346abc19475
font_02_sfnt_off00013e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1