Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b7a5b7c1a0c741f…

MALICIOUS

PDF

70.2 KB Created: 2021-08-09 03:24:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 93781f454510e01af8931eac330724c8 SHA-1: cc0146f79baedb9994f85790d9df9bc5b290a32b SHA-256: 5b7a5b7c1a0c741f5911a415d275e59deaf0f55efaf8eb8a3a463caf3288f313
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9032

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://flygarfield.net/userfiles/file/kadepa.pdf In PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/4c499fc498523254465fd7aa70cc7377/32765579229.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9036083c5---63234502405.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/38984447416.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/b40c10d2f4c82e65e9b066ed2a05a2bc/wamofaxafaxutulanubezej.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/66593374370.pdfIn PDF document text
    • https://batdongsandothanh.vn/luutru/files/63116234564.pdfIn PDF document text
    • https://goodline.by/userfiles/file/fimebo.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103ed7ba5e37---36656930286.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/tujalimelezagonirepuw.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/33098372934.pdfIn PDF document text
    • http://biafrapol.pl/pliki/file/4928110822.pdfIn PDF document text
    • https://chp-travel.ir/data/file/16852917629.pdfIn PDF document text
    • http://proreferee.ru/uploads/ckfinder/files/63144929908.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/b9f785c0b884dc8198f571a7bfa7674e/wolevi.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849f25b266d---84038894040.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/polorixafezexamasonupil.pdfIn PDF document text
    • http://dzbnf.com/upload/file///34812260096.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/155956123d7a9115066bc6bb62c3dbb9/86071970852.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16076a2bb6d425---38746855964.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e946548060---64864174011.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160758aa58d3e4---17695015025.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e31da6f79f---tatojumif.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d337f9e397c---91462857228.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=what+fortune+500+companies+don%27t+pay+taxesPDF link annotation
    • 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_off0000f536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF536 11436 bytes
SHA-256: bc0ff126478212dff2d138a4ba6f68c0b8c9b741701135ec8e8acd4cee2c0a17

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