Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc64b47c569d7f5…

MALICIOUS

PDF

72.6 KB Created: 2021-09-07 09:32:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7297ef082324c1fe055f1771c4c3f242 SHA-1: 82b85949df3c94fda1e64371bde982d7cd399769 SHA-256: ebc64b47c569d7f594da15664d9691e60d6d57475e1117627ae119ad0aed1168
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically related to phishing. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a deliberate effort to obscure the final malicious destination through a chain of redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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
  • 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 https://allytemp.ru/uplcv?utm_term=spirit+of+sonship+pdf PDF link annotation
    • http://impressivetravelvietnam.com/upload/files/44353625600.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce64e9de498---dimenejazofadasusug.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e1194e8fa---87450275031.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/93806970481.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/fd6a6cftilvcltrvl94vpv06nb/33088832352.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/94f0f73dbc20343d68b683e167054148/vubetedawagaxugunojut.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/a2e16e71ff9c9f3a3e5f39e113b6dc87/29790866233.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/63052977055.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/rekefetaromajijejevineni.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/8fb6ed63e211f7c2afd30689352515f1/15637164264.pdfIn PDF document text
    • http://mgtofubbq.com/uploads/files/wufem.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/fumodifudezipekodimudezer.pdfIn PDF document text
    • https://pragatitic.org/ckfinder/userfiles/files/gogemufujesag.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/abb272eaf20599da834ebb0e15c79e44/vejutamufaxelubakufudi.pdfIn PDF document text
    • http://gyobel.it/public/file/sexozuzakewakefulasuvim.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/99550458994.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/7620597481.pdfIn PDF document text
    • https://sitycare.com/FCK-UserFiles/files/92541138641.pdfIn PDF document text
    • http://klick-tipp.at/ckfinder/userfiles/publics/files/47347682634.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/ndge7o29572qddl7a8as7ovb78/38931815240.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/1dr6n95td72bpu31mlo8nbf7t0/91378456616.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086c4a982d26---41477278971.pdfIn PDF document text
    • 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_off0000b9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C6 10328 bytes
SHA-256: 7dc78527dbc0ed3236e91240cb7988112193b55b680902a850d40c612b133208
font_02_sfnt_off0000e8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E9 17168 bytes
SHA-256: 093ebdc5fb84787bfb64721f72dfc1190bc2bcb7b096a097b0e19695c30bcb38

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