Malicious PDF — malware analysis report

Static analysis result for SHA-256 609fd6d9d0845693…

MALICIOUS

PDF

79.5 KB Created: 2021-07-02 14:54:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 9e0f6ee0e19b7ce69a8eb781d5c92d6a SHA-1: ae33f5a60981446aa081936702b269fd535e5bc3 SHA-256: 609fd6d9d0845693483dd754b49434df547a2eca7ab65634c97e98870d4b2a9e
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting. These links are likely intended to lure users into clicking, potentially leading to phishing attempts or the download of further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2676

Heuristics 5

  • 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
  • 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://laiyi-art.com/userfiles/file/39010994940.pdf In PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/4baa414106cd16a75d61f28fdbb67fe4/55982859895.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/mufupaluxipixoziwuwalar.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2a832e6ee---reboj.pdfIn PDF document text
    • https://dalyanestate.com/userfiles/file/21899657095.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8bec0e6ae---60262591365.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f88c9241fa---toturipobexerev.pdfIn PDF document text
    • http://summithighschool1958.com/clients/71652/File/birowifixotanuzuw.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/98cec1cbde172834ca372897e5ff6415/waxupasanupawikomateza.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/bc2fbbcfeed3639b0ad7c13e4b32cef3/tipibunuwemovujawewuxe.pdfIn PDF document text
    • https://denimder.org/resimler/files/wamuwafi.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/48508118243.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/681d1cb332bfacc038e8aa8123669bb3/mowawomosuwogewogib.pdfIn PDF document text
    • http://gdaniec.com/upload/files/kadasifupuzadifaki.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/72705199598.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d62eada58---wukabisedapawezirow.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076569c33f21---59193617802.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607379bde032c---65633543340.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/b8d7c25d565444f4b57020d63a50acfc/supudif.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607989ccdb749---gisixaw.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/mewadekofa.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/leburegu.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/37347877669.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/abce404813f9dd26d66139bd9c45e6c0/52451712650.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/b18s6k8b8ph1067vfq3bi4gguj/8054808471.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/reposogugogumaximo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=video+indesign+interactive+pdfPDF 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_off0000f490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF490 17164 bytes
SHA-256: 6e0672a62921ae85599d89627a7ca142f57e9ec1c53c79b8f9ac7b72a7aa3547
font_01_sfnt_off00012171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12171 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1