Malicious PDF — malware analysis report

Static analysis result for SHA-256 006aa3dab6d539b5…

MALICIOUS

PDF

89.1 KB Created: 2021-07-02 05:33:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7ed68ec9b48f895e040adb628404a7e1 SHA-1: 3c3975e92f9183099ede8d635cc3e4d8ecd36a1b SHA-256: 006aa3dab6d539b5e2e9c3b5b728d0f393c901c89ed5347c77d5cc1f81fab1d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection for phishing and trojan activity. It functions as a link farm, directing users to numerous external URLs, some of which are hosted on compromised WordPress sites. The presence of external URI links and the nature of the hosting suggest an attempt to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • 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.
  • 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://coretry.ru/uplcv?utm_term=grilled+cabbage+slaw PDF link annotation
    • http://tofuyatogo.com/uploads/files/5853398946.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e30b87f0edfdec4ab3b4ce3c56eaccba/dopokakibimejem.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/ei8k9rp0en7q8s05pbjtflnks1/bexukijuxaforugamavovabus.pdfIn PDF document text
    • http://hydrem.ru/images/file/15954062579.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/46320474605.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160983cf536359---lugaxomelo.pdfIn PDF document text
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/faxevulisapi.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/pifuzad.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/74263115785.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16082027ddfd4f---69878373314.pdfIn PDF document text
    • http://hydrem.ru/images/file/89311932671.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608cabe77a172---pixofak.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/89a02a6f2a7a527614ba7c0d750fe449/desevuxepepakikuw.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/suwanesana.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07280bf63d---81559672006.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/qo8grh7kpu7ng7tueajnd8eb1e/jobamenatekaduwexovunis.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/reganobiremivetiva.pdfIn PDF document text
    • https://isleo.com/i_photos/file/12862607226.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc956e515e---31640919582.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/tevalopunowu.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef7302a4b6---25618411282.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/jurobefibaje.pdfIn PDF document text
    • https://isleo.com/i_photos/file/soleseven.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/06ni7cj5okci0n1iln5modlet1/99135757207.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/ggadrvj8mid49717fslsliljh6/mevodofavofewixorobi.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d63dafdead9---83493270905.pdfIn PDF document text
    • https://emauto.lv/index/images/up/file/vobuvojazu.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_off0000f641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF641 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E58 10488 bytes
SHA-256: 420642fcd6ed69d66287d34690867b8ec22ee28f72aea853f96f99a4f44a9996
font_02_sfnt_off0001261d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261D 18076 bytes
SHA-256: f93b6ecf77b4806e6aa80769f6525d011f14f8ce3bddac59ff2876130f930e95

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