Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5073b6d6b7b30ee…

MALICIOUS

PDF

112.5 KB Created: 2021-08-10 13:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 60f1e5cbb9d45722d1ffd40e34a1908c SHA-1: a0e3f53dfd908c852fa4df252ea5fdccc588a050 SHA-256: f5073b6d6b7b30ee726a438c288718b62de50cee7e73f36b3b2a7ea53a183ed8
124 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The heuristic firings indicate a pattern of using disposable hosting and UTM parameters, common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier clean score 0.2233

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://archism.ru/uplcv?utm_term=who+is+pilar+pascual PDF link annotation
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/21ed221a245bd065ab039e4942c4c9a2/53510748019.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c92237a658b---vuzufuximoxakakutigawaz.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/000d6de2219458f6406f0ffa73118e7f/wokaleji.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/8178d1cab65423a34513ae5e2add0c7a/luvotumogara.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1610e64efaf0c1---7794998351.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/eba5abab0eaec500ca52b06f6a91a3dc/68755295494.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/31673142849.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/88717890235.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16103c1825ecc4---24146429185.pdfIn PDF document text
    • http://locnuocvietmy.com/Images_upload/files/5275799131.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a719a102168---68401371332.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070c74b3c093---37924729427.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/6a6c020426360a83e60616f8ddac88e9/naliwe.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/gvmnopav4qugfnb9pn7reg1kil/fidupagamuxote.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/40ea9e769a48ce3f8dfb86fdcd9c6602/83155730656.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b75971e685---lejasarajefemif.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/355f1f4b5cfcbe4f6797218ea1cf51f0/26166627727.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/1d9a024a2435cce20e32a8965c898671/kidus.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df774e73e42---dibadazekugenutatizazod.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b47f6024a---67852908886.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/61562869182.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acad3f99336---58767253352.pdfIn PDF document text
    • https://bloomeng.com/uploads/65725231245.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afe88a706dd---96815688355.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/38eb7b3d4b81aae6e4e4ecc9ac4734b8/40204976279.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_off00016b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B95 19128 bytes
SHA-256: 1a4df73a43826de2813c8f7f653683b059e813efd5f9a80a477100ca990677ac
font_01_sfnt_off00019cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19CC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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