Malicious PDF — malware analysis report

Static analysis result for SHA-256 d867e2ad321ca7e5…

MALICIOUS

PDF

80.9 KB Created: 2021-09-18 04:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3ab17806da608e3d61a22b3947aa33c4 SHA-1: 6aa31a5118d76dbe93f81f4d3b914cbef33b2048 SHA-256: d867e2ad321ca7e56f8e60f07d1319fd2e6f9f8b091e612040998f86a189ddb3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The presence of an embedded JavaScript stream and numerous external links, including those hosted on compromised WordPress sites, strongly indicates a malicious intent. The ML classifier and ClamAV detection further support this, pointing towards a phishing or link-farming scheme designed to redirect users to potentially harmful content. The document body is heavily obfuscated and does not provide clear textual clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://agri-mal.pl/userfiles/file/99497507255.pdf In PDF document text
    • https://gikguamerica.com/userfiles/file/tatevobipewe.pdfIn PDF document text
    • https://m3nan973ru5-pa571.com/contents/files/45903144174.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/gigatazunoweroxexevud.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/gabodulizikanujafatafijez.pdfIn PDF document text
    • http://gearcon-eng.com/file_media/file_image/file/jigis.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/kavilixiwivefidelab.pdfIn PDF document text
    • https://cpsguffanti.it/uploads/file/wamebebemanedet.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/nivubalet.pdfIn PDF document text
    • http://blow-w124.com/js/upload/files/2040098797.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/47899555867.pdfIn PDF document text
    • http://cdkuys.handysociality.com/upload/files/lasiremusubugozugal.pdfIn PDF document text
    • http://aorganboys.handyfriendship.com/upload/files/kuxitepobevafin.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613607b1a3651---8160229604.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16141641faf0dd---35042037926.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/99379333093.pdfIn PDF document text
    • https://www.tulsarad.com/my_content/js/ckfinder/userfiles/files/wilopekizumoki.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/299656994.pdfIn PDF document text
    • http://bandbaajabarat.com/ci/userfiles/files/girefeturovi.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/72113516249.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/10324e0c39d54b980314fb1fed4f86fc/67096811255.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/gogixoladifus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+cast+android+screen+on+tvPDF 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_off0000d8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F7 17348 bytes
SHA-256: 65f63ff3d567ec96d3c7851901eb8d632ef0f98e445163c2307dc3fc15451395
font_02_sfnt_off00011dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEA 10460 bytes
SHA-256: 57e5c85a64d76060908eefb67492e905ca82aabbc9d934406007e2451b34380b

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