Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6eed5a4a5adb73…

MALICIOUS

PDF

120.7 KB Created: 2021-07-19 13:35:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0c901ce2b14acf4e4b707b81d17ec773 SHA-1: d87b8c6b85bea58f6523683f42809dc436a5ffe2 SHA-256: df6eed5a4a5adb73eb2bca096bd5fa25d7f8899457e3ae18694a467c7085889b
124 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, many pointing to compromised WordPress sites. ClamAV detected this file as Pdf.Phishing.Trojan, indicating a malicious intent. The presence of multiple links to potentially compromised or disposable hosting suggests an attempt to distribute phishing content or malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.1873

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 http://cn-biyoute.com/d/files/tusapusifegupozu.pdf In PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090f592b038a---poburud.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/sovajaloriforera.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/8b2282321f4d7b5632ebb374e46ace3f/zivub.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/fhqn2cd776i0tsvjoa9pc1upjj/25897758793.pdfIn PDF document text
    • http://caythuocdangian.net/images/files/3551352640.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210608234306606.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/fdedbda9093de2af9d7e30eaeaea4437/9177004236.pdfIn PDF document text
    • http://studioambienteterritorio.it/userfiles/files/95656768238.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/dd30b9e96cd213fe639d83033a71492f/53479948894.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/6lh8d9lsc3gvht298im6nq15tu/6172519042.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/7p14evnpjm6ac25cdjcb4ordp4/vekon.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b0df86e22---puwokefetuzuna.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/masuzenuzukajiduwuxuzolet.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f48c26c96---75566946651.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/bc03e6227e666fd85bd02a9ad16bcd98/32438469101.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/kigukutekuduka.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160816f9b2f00e---didedalosejibapiw.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3edb536d7---75732883628.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c969592914c---gejubexojabagixasivonusam.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/25425758508.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/9851158632.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/fogomodu.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/bikeginamuxurazipagur.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/puzunowomotadakefaxevika.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/bedojizif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=elric+of+melnibone+witcherPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ab28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001c33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C33F 10480 bytes
SHA-256: 37bb1678b6bf6d846e5e491a57d8f012baffc0fbb9a90676f8745783162136bd