Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e65d7d40e8e26b2…

MALICIOUS

PDF

85.3 KB Created: 2021-07-07 12:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8f4750aaea69fd31e2d4bfae465996e1 SHA-1: c1a9ab4416772b0d294cb55607c84b0e25be0c24 SHA-256: 1e65d7d40e8e26b23719547e409409482952ec7801c5644e5a28ea2583fa1dc8
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites and disposable domains, suggesting an attempt to redirect users to malicious content. The presence of an IP literal in a URI further indicates a potential phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2a689bb04---62736850307.pdf In PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/7247b69cb669a856957c5e249628e328/wipavusemitafujakuse.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab867823a9---44182701108.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/89137342336.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92cc2332d---parogavigonuliloxaj.pdfIn PDF document text
    • https://rubenferro.com/userfiles/file/gupab.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2eda9225e8---16392376088.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/gexinesugisejikufe.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160964b0a2a31e---98589972314.pdfIn PDF document text
    • http://skyline1968.com/clients/74864/File/jajibufowinizun.pdfIn PDF document text
    • http://msinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/16944494202.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcd9c57684---vavujomiw.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/givufebevubaxupanenaro.pdfIn PDF document text
    • http://khachsansapa.vn/webroot/img/files/visitabomuv.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/s5uaob73275btp7o0u2j97j98m/99695686294.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079adc52ccbe---zokovawawekoweguxiduvul.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06c2647680---bufapupekufisikevipinozad.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/cd6b788b405b8e89d0f7d6d196761be3/66503827416.pdfIn PDF document text
    • http://weymouthhighschoolclassof62.com/clients/5/50/50fe23896e84432c97ff20d680692bb9/File/virofalufiduwepujina.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/2i9bvrhgcpku2o6ej2q9qipdlh/zogumogapuxiw.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/73232714944.pdfPDF link annotation
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/698cb8a7c6b4ad685075544eee2a1c2a/panewegigijutivuzamopef.pdfIn PDF document text
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b84a9025f3---87212712465.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160867facaf9f9---vanube.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/562c15f0e501b41d6ddc27d9b69f54ac/fubuvekurudotuguje.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/22e46051148e7d7ba62ef66d66846ccb/38106486.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c774a508f0---40072344811.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=signs+your+anorexicPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E4 10652 bytes
SHA-256: a042bea56549e653c7539723b4cd5486b771eae06eb7bceb35aaae90245413fc
font_02_sfnt_off00011e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6E 16140 bytes
SHA-256: fdf3860601afd3658db5ced5f850bb7e65df11b1df1a840026ec38997b92a43a

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