Malicious PDF — malware analysis report

Static analysis result for SHA-256 946323a15ae757b5…

MALICIOUS

PDF

70.4 KB Created: 2021-10-03 18:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f8085d0dd2e34a5e37ce3f28157ef8f0 SHA-1: 509088ac4a0514fd44c6067368295d21169a17ea SHA-256: 946323a15ae757b5bd350e15a561a9db0378cc55f78667ce7f6f637cdb426d4d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to potentially compromised or disposable hosting sites, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically classified as a phishing trojan. The embedded JavaScript likely facilitates redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 7

  • 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.
  • 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 http://morecoredesign.com/images/imageUps/files/94381332705.pdf In PDF document text
    • http://imobilestore.de/userfiles/file/11457805448.pdfIn PDF document text
    • http://111-orte.com/testarea/cwsCMSlight/media/files/wuparorunaluwexabemefejir.pdfIn PDF document text
    • https://fier-forjat-valimet.ro/ckfinder/userfiles/files/45309402091.pdfIn PDF document text
    • http://carneiro-sa.pnh.pt/js/ckfinder/userfiles/files/75001805229.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/zonajafamopu.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16145652d76c8b---36648859638.pdfIn PDF document text
    • http://franzoesischebulldoggen.eu/userfiles/file/73307608287.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/55715135205.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612f37882bce1---bojorojaletubukun.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/8478f6d984e41ebb98a2bee8cfcafb27/betuzizabaj.pdfIn PDF document text
    • https://paulogomeslda.com/userfiles/file/60583096200.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/56938320911.pdfIn PDF document text
    • https://allcondosales.rodeodrivecondosale.com/userfiles/files/51424328987.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/865ab43ec0f013c741ca39dec43b583e/rodutiwaduvurumeserafosa.pdfIn PDF document text
    • http://urgentcarepb.com/userfiles/file/meloginetate.pdfIn PDF document text
    • http://canadianrockies.info/files/file/35807225850.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/51668131047.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/13157369610.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/bevabiritalovoten.pdfIn PDF document text
    • http://chinastom.ru/userfiles/file/sutugevoketolivopefo.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/87394508165.pdfIn PDF document text
    • http://dongduong.net/Images_upload/files/nuwogixa.pdfIn PDF document text
    • http://vilocom.net/webroot/img/files/zirixi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=the+seven+planes+of+existencePDF 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_off0000b009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB009 10608 bytes
SHA-256: dff0636eba8dc18fecc45eab95588e4f214754ea99335944a36fa3fe54292ec4
font_01_sfnt_off0000c849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC849 16368 bytes
SHA-256: 5b697f37de696064a500b8203f6ccddac8576df3e69e0288ff9d7f0e431f840a
font_02_sfnt_off0000f290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF290 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1