Malicious PDF — malware analysis report

Static analysis result for SHA-256 6187eefa906fe0b5…

MALICIOUS

PDF

90.7 KB Created: 2021-08-04 04:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2d6ff12948d80365be9684cc8275a570 SHA-1: af9d78a9c55c80b27dde6392ef8ada94657a8b60 SHA-256: 6187eefa906fe0b51f8a697c4f0c48bd87f87a43051ab520f6a8f3319137ac04
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised websites and disposable hosting, suggesting it functions as a link farm. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://architettodrabeni.it/userfiles/files/64691906702.pdf In PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/51359725266.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae1f690e777---tawugekeseledemexefu.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/0cdf59d614f3659c1cb6946de8ecff03/70660237235.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/jeraripen.pdfIn PDF document text
    • http://kemmurad.com/webroot/img/files/15254488488.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b471eb6566---fesex.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847b55958e4---tavas.pdfIn PDF document text
    • https://rajatotogroup3.com/contents//files/mogegux.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/lowolanomifuvaxod.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9f8345b43---98432925545.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606e053b5bc21---25696602954.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/52831321957.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/2b66327583af420730f814b5a2459256/rigedot.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/61254378723.pdfIn PDF document text
    • http://canadanur.com/resimler/files/zeredek.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/48328840190.pdfIn PDF document text
    • http://angeladaniel.eu/uploads/files/58113289816.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/jorujet.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae26529c5f---mamuwefakimaseredo.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/df3a24feccb59b189df5bdc7f43000ba/75457393720.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/be28e602f6c3ce8d713b45f577b70d1b/94391084629.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/44731966933.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160845ddf8712e---74632885306.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=hack+fifa+mobile+2021+androidPDF 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_off0000eac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC5 25064 bytes
SHA-256: ae4d4d2b905880bda0c25ea73168ae26fe71473294c60147f6f832ecf93d3918
font_01_sfnt_off0001293a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1293A 10888 bytes
SHA-256: bf273a635226989596bfcf77fc047865f793e307d9a8c2def87c3269d052da7d
font_02_sfnt_off00014260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14260 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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