Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f9f47241fb6a1e…

MALICIOUS

PDF

86.7 KB Created: 2021-07-01 09:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 952dc290a2f267cc2aff8c35437fcf9c SHA-1: dca1b19a6ce8cc03b0358e992d6a9e69ba2383aa SHA-256: d3f9f47241fb6a1e90cc6867bdf5aa6babb8412e2f14fb4b982eba9f420ac49a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating it's a phishing or trojan distribution vehicle. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, likely serving as a distribution point for further malware. The presence of external URIs and link farm heuristics strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://ahchala.com/img/file/jejemekaganon.pdf In PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8fe67d7e5---85752320413.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/watunaxuliduvazizo.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be57a90b8be---11521816422.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/0cb6cc456b1fa7cdb29edfc3a3e967a8/befutumijomexedemijof.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/0eeca4cb49866b9ae273e0627d2e4666/91054720435.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba904669ea9---sutuvalozelij.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/48525481578.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/84591243937.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/beloz.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/e91a7db362d8d38a994709c08e2cf834/22894330090.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/24d3ef35bceb34e683fedd953b1482b0/12235265225.pdfIn PDF document text
    • https://actorconseil.com/files/file/tozuxizotudiziwoxiledi.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/mkinvhiff7d71ij4s19fpe7le2/tipadasipose.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dc2c2d8d6---32995545514.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/vegiletitixunevobakerok.pdfIn PDF document text
    • http://japan-railpass.info/images/blog//file/35241729571.pdfIn PDF document text
    • http://furniture83.com/upload/files/muguwowibejezemoxijobanid.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9c1c1235c---negijinetugigawenir.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0c4c2e53ce8fe527c2ea7f991f9bda20/89181559067.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160825ccf326bf---18077181044.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/sefadidopu.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd2e4e4625f---suvuremanijedanikoz.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/172137199160a93f208135f.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/660a2c2ddb689b0d1085acdee0a0281f/pipezofovutiwadijused.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=light+as+a+feather+riddlePDF 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_off0000ed54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED54 10368 bytes
SHA-256: 67cecaae3b10e2a63e821e732a129608e213d73cdc30ec19d63e00bc8d2701cb
font_01_sfnt_off000104a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB8 18556 bytes
SHA-256: 6e0115555f6ff45452f08d0eea520ea7d5612541bc3e6fc59a2043e790f7fa9d