Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7fe69e002e0fb07…

MALICIOUS

PDF

87.4 KB Created: 2021-07-25 10:03:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 321f46dc1deeb3e9125bd229f335c999 SHA-1: 060c3ca03ce5af38ca1851fa771202a3cf4d0487 SHA-256: b7fe69e002e0fb075a6b08b4f7ae3c17fb5ca0c561dafc9665fea4e159e5c850
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting an attempt to manipulate search engine results or redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or execution of further malicious actions, contributing to the overall phishing and exploitation attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/2b8482d716fb3ab0a64916c3cb0e43f0/tegisuwufekesiviminasi.pdf In PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/sawuwexomexa.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/52018536647.pdfIn PDF document text
    • https://geneolock.com/ckfinder/userfiles/files/salodunedimi.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/gakazavipaxat.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210607042648305.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160dce84c0c8fa---50451101749.pdfIn PDF document text
    • http://chiangmai-esc.net/user_img/files/lirorob.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6f4cbf7b2---guradudoximex.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/91761027721.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/q6v5g76d6uvncvh1hp93ugjgo4/kabixutofaratufodefa.pdfIn PDF document text
    • http://burrburroughsfamily.com/clients/55468/File/86008304452.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/294326bd7b8446e891fe8a04bb0933e1/91838917528.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/33fa344726a395a3a457ac7b1a0f07d4/remegavugitugi.pdfIn PDF document text
    • http://roocenter.ru/upload/file/19431069405.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/45596288938.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/33918689875.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/68qj3onlcv4fp56883len7fek3/fugofebatatixotomi.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/tozovejizataxud.pdfIn PDF document text
    • https://regiefranchet.fr/userfiles/files/gasofurejel.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac73f82ddc0---57051609204.pdfIn PDF document text
    • http://www.kammerpop.de/files/file/52144680294.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/1hs3ebm1e8b3s9iepoarph1val/51483127893.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=colkatay+columbus+full+movie+free+downloadPDF 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_off0000f1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CA 11268 bytes
SHA-256: 97fc9d66fef29963387ddf76c70a0e7995eaebf403829d205dd571e08ddfc3dc
font_01_sfnt_off00010c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C56 16812 bytes
SHA-256: 0f32b2b6f8f4ba24fb30d87b06f01628f584109f05efd83f4ff144be8d631707
font_02_sfnt_off0001382a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1382A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1