Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb71d64dbe92fee…

MALICIOUS

PDF

84.3 KB Created: 2021-08-10 08:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 966a026684f38b6bb0e28f6c70ac6fc1 SHA-1: c5ff82d5cc8a02f60f19fe01163d37cf37a8a338 SHA-256: 0eb71d64dbe92feedd7a370eba80cbadfbc0747bf3acb803510c6794e080a3f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is flagged as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. The presence of numerous external URIs, many pointing to compromised WordPress upload directories, suggests a phishing or malware distribution scheme. The document likely serves as a lure to trick users into downloading further malicious content, potentially exploiting vulnerabilities or delivering unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://queure.ru/uplcv?utm_term=descargar+civilcad+3d+gratis PDF link annotation
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b05fac4af8b---riparojejino.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/6f477cc1a8986c4e7415e67eff1cb91e/21426113966.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085dc846d24d---33066032126.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/vetunuxevaboxetom.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f27af49c43---tepadedure.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/futexufaruvuj.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/fowusapolumizo.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/161027c84c36e3---gosatomipadagogivu.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/1fa59fb48463610af3dd5604b36ad64a/kirokijekuwuv.pdfIn PDF document text
    • https://drisraadentalcenter.com/userfiles/file/66474054383.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/2336414062.pdfIn PDF document text
    • https://netpage.info/userfiles/file/85337046055.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/6224fa524e60927c6d053572355d53fc/38845214185.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/51008f5a0e28f91afa5f37138931a6af/majelutuxejipofo.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/159268466760c8ea15e9e4d.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa7bf55500---49562133766.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/kizapowukojaxa.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f45455ad633---rezew.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/gikekezurenavanuban.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3b969d22f---50178202653.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608528af372be---92961465975.pdfIn PDF document text
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/16934730476.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_off0000e329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE329 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB40 10560 bytes
SHA-256: 65e72ad45e61e7ba939edf7c1065defa4a75f5be0a5b6153b5544e69bc7a5db6
font_02_sfnt_off00011356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11356 17984 bytes
SHA-256: 25a9c416fa1d62fddfc9fed266a4a65a39e552d44d86450e7996ee219c9fa9ac

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