Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd09353f40d90c9…

MALICIOUS

PDF

150.5 KB Created: 2021-09-04 05:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c7061f92dfb9bd5375aaa8deed336db4 SHA-1: b1867c44665496b11baa3b02704239a69f2604b9 SHA-256: dfd09353f40d90c9a54c51c6b2c8c5cb1dca42e3f8b5ee2d8eb052f84c693f7c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains embedded JavaScript and a large number of external links, many pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of embedded JavaScript indicates an intent to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 7

  • 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.
  • 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://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075bccc80f12---jibefofulotokiraguxuv.pdf In PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160866affdcb51---53269494656.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd65d862f6---nutam.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2edec2b05---topabamu.pdfIn PDF document text
    • http://vdtonline.vn/static/uploads/editor/files/nuwosekugurob.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/d5e861e451ec8249f811bf7b5b629711/xizisaviwiramovikule.pdfIn PDF document text
    • https://foodsafebox.com/ckfinder/userfiles/files/semowujidixininezakola.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/zunogelawuxegagaleg.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/92255711013.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/derekojafaw.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/ngov3vum5avi7kj4jkncgt8cv0/24451679170.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/105u3d6k6kthhi2oost65e8741/51371389069.pdfIn PDF document text
    • https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/4d944cb0b00cce4148a27179de5d823a/rezopanen.pdfIn PDF document text
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28411497140.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1628142066.pdfIn PDF document text
    • http://lejonhund.com/upload/jenez.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/93774915706.pdfIn PDF document text
    • http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86685906734.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/18431e84a94b39a92f506ac04f065c53/kufemelogujubep.pdfIn PDF document text
    • https://dzido.pl/userfiles/file/67640653118.pdfIn PDF document text
    • https://www.area-tlc.com/public/ckfinder/userfiles/files/22336128934.pdfIn PDF document text
    • https://unosms.us/userfiles/file/kesizodudovuvaranan.pdfIn PDF document text
    • http://quimis.org/js/ckfinder/userfiles/files/38919346108.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=nestle+case+study+change+management+pdfPDF 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_off0001e79c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E79C 10948 bytes
SHA-256: 61b93efd34be1255f3f9462a99999f661a8c87dbc3f6e5443ffa090654575584
font_01_sfnt_off000200a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x200A6 19500 bytes
SHA-256: cc6fc0445e812bfb30437c906528db8e5e15bf40ac209ed8ff636f46406a815b
font_02_sfnt_off00023349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23349 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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