Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0786e04160c1436…

MALICIOUS

PDF

64.0 KB Created: 2021-07-23 23:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 28a02f2e6ce9930ba0bdcb7fc129bf91 SHA-1: 53e49b8331ef0606b3bc008d3286f0e3576a3007 SHA-256: f0786e04160c143683ba74b7ae64fbcb2223dcfa730991b22b2a8907e84d5568
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites utilizing vulnerable plugins like 'super-forms' and 'formcraft'. The ClamAV detection 'Pdf.Phishing.Trojan' and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a phishing or malicious redirection scheme. The file's purpose appears to be to lure users to these compromised sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4429

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 https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/76q9t6t2tc6cq7tflfbmqotfk2/95850155088.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/r343cgjvjiqvpfieql79aps387/93384951481.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/903f6837d292f462a1f2378dde6e4cb2/83339215136.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b62deb04605---pavub.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ace9351ea---55939787649.pdf
    • https://stbenedikt.ch/userfiles/files/vovumidumotamomuxafupek.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/b545990d206fd2aa6d6597d988388464/bobulobuzoteluzodasuvoja.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5f3aeaee3---xifigog.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb2d1dc7b2---metubigewolupulad.pdf
    • http://svx.su/ffile/file/lifopovetelezal.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/da49e50f8d447615afc2ebedbdb60ed7/14466181735.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-4-30/20210430164518269618.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdd060418f---62537443590.pdf
    • http://georgefamilyreunion.org/clients/86186/File/3651058766.pdf
    • https://wecareprogram.org/images/file/47865774060.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a0ba3cd4a---xuxotezinowetemeninavasem.pdf
    • http://china-miyaco.com/img/file/20216261409.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16070e6c47ff03---68429454022.pdf
    • http://www.cerel.eu/images/wyswig_images/file/gagabinonolifamapil.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16070a47699b32---vanupalulinibawarijuroj.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16076514e98251---38065484382.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/ab9df68bd95075957d397bbf149e64dd/18181377406.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/6d171ee5c1b22f1f6a5a2073cca0e4c3/87793703862.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16080dec41e58a---28678084185.pdf
    • http://banphimchuot.com/userfiles/file/garabulegogerarapibole.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=comportamiento+del+consumidor+solomon+11+edicion+pdf+gratis
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/126033cabef87815d5c95460d74397a6/sobipuki.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8da.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DA 16792 bytes
font_01_sfnt_off0000e0f1.bin
3d7ea35c0f9e792515a4080e8b02880edf6b6b2717f8481874f9107f2d672b02
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F1 11148 bytes