Malicious PDF — malware analysis report

Static analysis result for SHA-256 063fdbe39a4cc315…

MALICIOUS

PDF

92.2 KB Created: 2021-06-27 19:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8ab0f84427d3c73cc77bc65aaff13f1e SHA-1: 8afc155dddc0ee301195a0cf6636411bc922c65c SHA-256: 063fdbe39a4cc3151221e4418f247297abaee177f992f814837c908d102833ad
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6277

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://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160847c839a748---sofarezepogep.pdf In PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072431420bf6---bejexibegamalafopaline.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/43802189029.pdfIn PDF document text
    • https://sportcity.bg/webroot/img/content/files/pebiset.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/zeriw.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/34c2b3733e4231b3e6a0fc43058e258b/32000336865.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/sojebararu.pdfIn PDF document text
    • http://slhs1958.com/clients/18590/File/nuvopagor.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/38966354546.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16089e0191296b---botopa.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/diliwulifosibolomabeset.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/826897eab50045caed32c685dfda3dca/31559014102.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a392989e776---zosomebijo.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/48605cd3d4cca784d850c1fa0838e135/rijunimamujozobuveza.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/29027311194.pdfIn PDF document text
    • https://kawanmto.net/contents//files/51406558338.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/506836861.pdfIn PDF document text
    • http://jnafarms.com/clients/864068/File/lumilaranegazavolozofel.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/5bm41m9c415nbicshfh8cc7s96/zojepatiwakusevoxevit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=disposition+meaning+lawPDF 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_off0001360a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1360A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E21 10580 bytes
SHA-256: 61d3cfe27fa6de9bc6d57a47b39a7151b962e48d2c3aa836c4c102618afe762b

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