Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4ce25b790360e9…

MALICIOUS

PDF

81.8 KB Created: 2021-09-20 22:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ba15e47dee8e696042c47515a05ff3c2 SHA-1: 7123d84d310a0ab272ada15d8d571f91b119dd7c SHA-256: fd4ce25b790360e9fc0398afe681271e78899fb21904398611c0c67a55788323
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external links, some pointing to compromised WordPress sites, indicating an attempt to host and distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to deliver a phishing payload or exploit. The presence of a visual download button further supports a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://auswallendorf.de/userfiles/file/53748173805.pdf In PDF document text
    • https://buyafranchise.org/files/files/tinadumaxatukozibubuti.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41415033716.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161409d247d5f4---49726359722.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/refaw.pdfIn PDF document text
    • https://suruburi.net/mm/file/24120322959.pdfIn PDF document text
    • http://cdenito.net/userfiles/file/vumovulilujakef.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/kegisefabezemuvifoj.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/99349220291.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/dca2d5bdc8c4a696f34f7e7b488ea8ef/gazekuwoju.pdfIn PDF document text
    • https://cqc-material.com/app/webroot/userfiles/files/8863423861.pdfIn PDF document text
    • http://wernitznigg.at/files/natesexoketatibumodotidu.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/watufujej.pdfIn PDF document text
    • https://gtijsr.com/userfiles/file/92067731243.pdfIn PDF document text
    • https://accounting789.com/ThImg/file/85315407716.pdfIn PDF document text
    • http://naoshima-tours.com/images/blog/file/rivopobomutebu.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/fevewumonanizasav.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/98446920022.pdfIn PDF document text
    • https://jlgardner.org/home/jlg/public_html/ckfinder/userfiles/files/2550257110.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140231467582---weturubititulajoko.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/pajazo.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/75157696734.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=s3+custom+romPDF 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_off0000dd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD76 10200 bytes
SHA-256: d960fe3f6ead25c32f76d9de2d8ab6096021f609f6eac29b23d233ef28b001f6
font_01_sfnt_off0000f45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45A 17800 bytes
SHA-256: 50c2b98aca5f862847f81eb2d76251363122cce5c83fd56a53ab085d390aca84
font_02_sfnt_off00012213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12213 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.