Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6a0e5726ce32fee…

MALICIOUS

PDF

65.6 KB Created: 2021-04-30 05:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e21572d38539490fd07fecb1aba7e6b SHA-1: 5e40f4fd04bc9ea2e9828d6869ecafa85ca9ac39 SHA-256: c6a0e5726ce32fee3103fd2263f5e0027aaab675e9a77db59396aa63b82162d4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS upload directories, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the embedded URLs and heuristic firings point to a common pattern of using compromised sites for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8602

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://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/df161625700cd318aae613ace642ce62/rijelapalapoxoveramur.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d02646022c---voxogesi.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d15fc641cd---fesujejewalotenegugu.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/6fc880275106db0823ff454ef555686d/lifuzamuwig.pdf
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/36ae53101abd66db2743410330354c8a/sogeluxiwolo.pdf
    • http://animationcoach.com/userfiles/file/92979651788.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/31bcef29fee8024abc24075681fba737/finupevigi.pdf
    • https://angkortaxiservice.com/userfiles/file/tufovobepixuporijojutob.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/kdd8kqnq7jm6m3v570euohf72o37ifvl/widivevugowodefipigigujap.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac7ecc4196---9627659514.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853036a421a---vesuju.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/7007ae677da0971191c6c5e7778635e3/bovovalipovizobita.pdf
    • http://agiusfuneraldirectors.com/files/file/sesosifugefetu.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/569767a0c63bb8f33721e0671ac0ebea/jajubifanubijudovufek.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/6c32f5fea8607ddf145a3bc8e6c10b07/86032413547.pdf
    • http://acpiindia.com/userfiles/file/63082953064.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/03gv8bjl92vt31aeomp5vsbp5e/gunawaxuwulabifuwikufiku.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/0lt3hq1qgb3jis588kvchh6ctl/ruzejixobutemuxumifoda.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/e7847b7d1632cd9f7f23921431df928a/gureregufizewopupejobesud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=combining+sentences+with+coordinating+conjunctions+worksheets+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daba.bin
9e64fb2f63681a058bcad35bee710f1da8ce473083ad2c4f6596271fd4afb646		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDABA 5812 bytes

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