Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3042836ee410e65…

MALICIOUS

PDF

76.2 KB Created: 2021-08-09 07:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 54a25294ad0574c2a6d2a7a28fe2d60c SHA-1: ac7f6b83b05f2253c654640436a63664c37a1241 SHA-256: e3042836ee410e65b6f7c59b5c2c190c7b27a8ef57d4764d38ae23f5a4739f27
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URIs and the overall structure point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6796

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 https://inwebjor.ru/uplcv?utm_term=calibraci%C3%B3n+de+valvulas+e+inyectores+motor+caterpillar+3126 PDF link annotation
    • http://aiswaryamatrimonials.com/fck_uploads/file/pofemopo.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/o3u1v2m49t3olmglirhj0n0077/34648234686.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f19dde7106---74744680292.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/vugiporufexeromuvamekimo.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe39198c48---kanazedibobevezodavibojus.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/0515e8c1052bea7385d4345c8caf42ca/zewudepibupanuwijifod.pdfIn PDF document text
    • http://erodiertechnik-wenzel.de/userfiles/file/gukafulova.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/81526618385.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/fudifanegenusixod.pdfIn PDF document text
    • http://richwoods1969.com/clients/861079/File/bovekenejopon.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/ktiq0hljl9qomkt51u1n6e341j/xatoredugovagakitadeseba.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/30965310212.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/65950779312.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f18b213a37---55663383799.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/vebasapopuniv.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d482a2c29---tonuwumarewolo.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16099ba2079261---pegupijotan.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/lularepigixofi.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/jg1s9367luutg807n37becb40k/82544349465.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nusowe.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/76790145648.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/jewolefopuwutibovovik.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a934055166---bitejug.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ad0e5890f---polidekimaveburenazug.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16084db6dc9720---rovororilo.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/81700080423.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2B 11776 bytes
SHA-256: 740a97d200ad7097df8cd978b7bce258db445a2a984073c40604cb0f4ee5053f