Malicious PDF — malware analysis report

Static analysis result for SHA-256 e917fe0fb494ef8e…

MALICIOUS

PDF

94.0 KB Created: 2021-06-29 17:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 31fc67c325e8b153ff61ebc258fe9833 SHA-1: d8b76c5982442e2905593f0b8b61a5bf8d4e1ece SHA-256: e917fe0fb494ef8e3c4c8630ff85ea3e97c460ac1712b3038f8247aeee0e4f13
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting. The embedded URLs suggest an attempt to direct users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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 http://casadiriposomarsala.it/userfiles/files/bupagejojaxakax.pdf In PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b001d4b92d---63244995767.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/216581540.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/rimukudigis.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9e1e98833---bazefelibuwavamo.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/gijikovimofiwilekap.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/136f50943121075bddb2f24672078e99/kesojoxazasaramesiliki.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/bojuxagutomabopatilokuzo.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16083c26c5fcef---xuzogojivapi.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/zatav.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2cbe483ac---31527943077.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/27545602821.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/butomunowuzeworomovupobul.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/81939127672.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/kebomo.pdfIn PDF document text
    • http://harrisonfamilyreunion.org/clients/868801/File/44142636275.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096a66f25ef3---sukinonuja.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/ida33vopsmche5a7v14tqhbd1j/dosurolapamuma.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608701b94e551---16918814387.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d88d0bc67---povedasuse.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099aca5d6b4a---68027427020.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/90972849713.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/ginabijufopajivagiwuwowuf.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/34h0h14crln62njj0sdsjif5j3/nakirazivibotipojejix.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/3079272600.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/49900313967.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=eleven+short+storyPDF 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_off00011051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11051 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12868 10112 bytes
SHA-256: c72c2eb6e2100b188717a3e3b352f676b2442833bfbe3ee83334bc5f5dbafe1f
font_02_sfnt_off00013ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF7 16868 bytes
SHA-256: 736ca56c7f48ccd11d2b4ffeafd7e0c56d5b1d7125ae473cd4bbc499bdd2239d

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