Malicious PDF — malware analysis report

Static analysis result for SHA-256 43366d56ee2ef58c…

MALICIOUS

PDF

115.2 KB Created: 2021-09-07 11:06:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cd32c69d9e431d41ea8a9caf848d9fd4 SHA-1: 2a503e4312d9c618365746cb18ca86d835622668 SHA-256: 43366d56ee2ef58c7bf2741f7663467017d6d592c947f367745ceca0ab6a4bfd
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, identified as a link farm. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The primary goal appears to be directing users to potentially malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.2364

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba51e331860---pozamutoxojedenilamu.pdf In PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/8b47a14f4f196d3b17687ea7557dbefc/90660561999.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4150b28306---lidilokebonajiwi.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/36985398152.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/11384119266.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/65908813439.pdfIn PDF document text
    • http://magicdiscoradio.hu/userfiles/file/28197954943.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/21294622427.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/35364735482.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/38042987168.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/labavamobobulave.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e08ebc69f---gujitogusarutawerurikirul.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/974749177341625844972.pdfIn PDF document text
    • http://year-c.com/upload_fck/file/2021-7-27/20210727205325856875.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/32d7343c2abe337f48bc5f15b06c0369/gaxatofaj.pdfIn PDF document text
    • http://bong-dem-long.org/upload/editor/files/25145133763.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/savaneteloxiwelefawuxu.pdfIn PDF document text
    • https://srmhomes.com/images/bulk_images/files/51459500553.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086bf76a0379---vefelifenawifosudewefa.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6146b1440---varuwavepisomug.pdfIn PDF document text
    • http://khachsansapa.vn/webroot/img/files/9010478579.pdfIn PDF document text
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/828b753259bd5ffb7f4f534f8188934f/sokisafiwilubojuwo.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/webesinoxalep.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/jeviwalos.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16098685c0d03d---79738364895.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=manual+de+organizacion+y+funciones+de+bimboPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17821 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00019038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19038 11128 bytes
SHA-256: bd09da1b6216b29f193846547c26701177d64aa47fc889afb0cf0f5d1b2b9fd7