Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe8be6b36ed6cd6…

MALICIOUS

PDF

80.3 KB Created: 2021-09-18 09:15:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 663333be4e42df4933356a7b0bb85016 SHA-1: b0765866ccefa7a8781849785448aaadcf11f86d SHA-256: cfe8be6b36ed6cd61b86d3d6c65ec4ded8eb3d6dcc2478a84e6fd8f73c3926c6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with many pointing to suspicious domains and a high number of distinct hosts, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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://fullprotec.com/ckfinder/userfiles/files/zobitewanitoxomuxa.pdf In PDF document text
    • http://arabstina.com/ckfinder/userfiles/files/40058254721.pdfIn PDF document text
    • http://divodizain.ru/ckfinder/userfiles/files/lugevusijavexazer.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/78094724166.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/91106327953.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/vokafurodewowakovejol.pdfIn PDF document text
    • http://vkts.se/userfiles/file/togulolupumem.pdfIn PDF document text
    • https://apelhijau.com/contents/files/84985526879.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/zimebibosafa.pdfIn PDF document text
    • https://powerliteaac.com/userfiles/file/84556887381.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/44389306134.pdfIn PDF document text
    • https://sukaunited4d.vip/contents/files/12396830197.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7759d8fe1---rutarexifazixiso.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec4fdb77c1---77668645249.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/45962070091.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/32368377955.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/38813493450.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/65827027337.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/wuwama.pdfIn PDF document text
    • http://tomgiongvip.com/uploads/files/file/zorobowovunipasojapatuv.pdfIn PDF document text
    • https://jatransfer.com/userfiles/file/15073546144.pdfIn PDF document text
    • https://suprastoc.ro/userfiles/file/wajogapororipepulu.pdfIn PDF document text
    • http://cmcthailand.com/ckfinder/userfiles/files/67682897069.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=the+owl+house+s2e1PDF 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_off0000d806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD806 9972 bytes
SHA-256: 33cd4c19377b6c19041bc512eab207f9228e9ee37e9174e77c48d8535f84f419
font_01_sfnt_off0000ee70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE70 17828 bytes
SHA-256: 60344d2c32c594c696679d56312cd24c9c842bca88ea7530ecc1874027ddf6a1
font_02_sfnt_off00011be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.