Malicious PDF — malware analysis report

Static analysis result for SHA-256 be98e327664aa5fa…

MALICIOUS

PDF

69.3 KB Created: 2021-09-04 13:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f61ea988f840ba9d45560e76d38a3b03 SHA-1: 724022327f00d6c100628d2e7ff236ccd198ff67 SHA-256: be98e327664aa5fa13f2e525b83fba7041014e5b417602ea94643e708126fd6e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV, specifically as a phishing trojan. It contains numerous links pointing to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4291

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://smidgel.ru/uplcv?utm_term=go+math+grade+5+teacher+edition+chapter+7+pdf PDF link annotation
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/917a982d40f6d04a575acf56643aeb86/20045524784.pdfIn PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/labududewujisupowopem.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607c54d3b51ac---gigogavizozaxa.pdfIn PDF document text
    • http://celyroknaterase.sk/editor_uploads/system/files/guxivunavumixebukokawopaz.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f9f8e5204fd2485ae4e0e6490ce5ac0c/silepujevigamifakukowitud.pdfIn PDF document text
    • http://huefpdf.org/upload/file/woxidozuj.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/kukexosojupiveno.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/e81f58c77cd221299633bb38633ada11/dilavikimobe.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/3d88cdd8cbee94bd6d75f5719dc42424/58156433695.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f0d705e8a3---37952961568.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/gikizokobonilafu.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b20646923f---zanusokoj.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612c4c0a980ce---78358873650.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/1jl3jtqdcc51774cv92elu4m98/xoweguwakemorewos.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083cca51685b---zupisuvidididalijepuse.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ba57f389e---68004402026.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845a36a2272---58619691954.pdfIn PDF document text
    • http://bolshunoff.ru/images/wysiwyg/file/42337305989.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/0d49a23fced167c8ece80ad8aa810333/lafoxugonuragiziwesam.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6ac7b3bd9---62147858900.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/8bdf337584a139ba720ecd2e26162160/30475904212.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd1e3b0490---46119491286.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/pukazavu.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/6646351331.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/lomofupupigorowanu.pdfIn PDF document text
    • http://chieucoingason.vn/files/mokomutik.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b4c28b36c---3867875265.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108aea21629d---kimokubokad.pdfIn PDF document text
    • 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_off0000c0fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0FB 15948 bytes
SHA-256: 8b8ff0dfc0b053007b630b324e089e4086380cd97aff6ef3cc9ce18b86bd1f68
font_01_sfnt_off0000ea12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.