Malicious PDF — malware analysis report

Static analysis result for SHA-256 154adbba74536244…

MALICIOUS

PDF

70.4 KB Created: 2021-09-13 20:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c27fe0446935d14da28291e81a88a772 SHA-1: 8846a025852f33dede89a453bb8d130869018fb0 SHA-256: 154adbba745362445c6cad8586a02839f3c602a06077630ac9b6325e25bf63e2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allier.proximeo.com/ckfinder/userfiles/files/ganavinimisagodupenopi.pdf In PDF document text
    • http://saraiaser.nl/userfiles/file/firunosadopijijomuxekazis.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161350b3ea7463---fodivuzutexomuvipo.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/tujejoliragusenusox.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/dazeripozilinolipozop.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/liwovukuzowivifil.pdfIn PDF document text
    • http://seoaudytor.pl/userfiles/file/48586693341.pdfIn PDF document text
    • http://rrarental.org/upload/file/gazagopelegorilekosora.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/9048487477.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210912_F3F4E6E31CEA24EB.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/97232597359.pdfIn PDF document text
    • http://www.saletime.gr/admin/fckfiles/file/lofenafuratokedet.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/bikagijonawuliwibi.pdfIn PDF document text
    • http://kdwatch.net/upload/files/2021091322010934.pdfIn PDF document text
    • https://sledovani2.gpshlidac.cz/www/userfiles/files/ladulap.pdfIn PDF document text
    • https://bibonatura.com/ckfinder/userfiles/files/nebupizudiso.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/46519917414.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/novekupesikiduvopebirun.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/2211a59f1667f50a61816f36783c050e/jukazisapisuwejomamesimog.pdfIn PDF document text
    • https://e-casainteligenta.ro/userfiles/file/13178077133.pdfIn PDF document text
    • http://shijijiaming.cn/filespath/files/20210902010020.pdfIn PDF document text
    • http://szigmetal.hu/editor_up/24513327512.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=clash+of+clans+apk+download+iosPDF 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_off0000b382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB382 15748 bytes
SHA-256: d602a83f7433439a0ca648f6f2ea561e6397811131e3d36680534988fa875c0f
font_01_sfnt_off0000db67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB67 10596 bytes
SHA-256: 5c24001445b2b60bf18b6025a1e00b803c604320c862e6c6a3cf85b53f9ad76c
font_02_sfnt_off0000f397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF397 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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