Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5fc2b488e958384…

MALICIOUS

PDF

80.4 KB Created: 2021-09-15 13:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d969650be257cfe589e0e3cec481d8bb SHA-1: 1a3162afdf3d2644e15606cecd6dd9a2d904bb4c SHA-256: d5fc2b488e9583844e447d94ce3f79462050b35383f8c7e36d02340394cc4b0a
204 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple URLs, some pointing to compromised CMS uploads and link farms, indicating a phishing or malware distribution attempt. The 'SE_BROWSER_INSTALL_LURE' heuristic strongly suggests the document's purpose is to trick the user into installing malicious software by posing as a necessary update or plugin. The embedded JavaScript likely facilitates this by downloading and executing a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 https://crysiq.ru/uplcv?utm_term=how+to+update+my+browser+on+my+phone PDF link annotation
    • http://honghuibio.com/d/files/kefufegixukomigijojifutot.pdfIn PDF document text
    • https://ebooksweb.net/files/file/wolezadog.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/64817454217.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed1f583014---33738809153.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613d359d3ca89---37395159996.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/bofudofezevofigafinuri.pdfIn PDF document text
    • https://medbioplast.com/klucharnet/images/file/42661311621.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/24772133971.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/kabozadaneno.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021091412032680554.pdfIn PDF document text
    • http://henskeschildersbedrijf.nl/upload/lutaworigowexomegof.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/sidoga.pdfIn PDF document text
    • https://tckontrola.hr/files/watubirajupive.pdfIn PDF document text
    • http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/91596334495.pdfIn PDF document text
    • https://aldapa.eus/files/galeria/files/707469549.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/22736895673.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/qqg7i70dpjpmto30imsto3rrvm/kogijefajupasi.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/pinani.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/gofog.pdfIn PDF document text
    • http://sakulchaiplace.com/Uploads/file/44683354404.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/13924119377.pdfIn PDF document text
    • https://producedepot.us/userfiles/files/tawixuxiru.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/67208777927.pdfIn PDF document text
    • https://oferta.lt/i/File/febugamedenugepukiwiwa.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_off0000d645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD645 10952 bytes
SHA-256: bb7d0e745a0533ab10d1b9b138909c017640561988672036e59c775007668820
font_01_sfnt_off0000ef46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10758 17300 bytes
SHA-256: f701293d3da9c7cceed6ff60476158227c68996eea567b6b2f30d2992d6e6890

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