Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef1b9fcd9bb1c8cf…

MALICIOUS

PDF

73.5 KB Created: 2021-09-04 20:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d4a1da8724069da50b1a151ed5d0d052 SHA-1: 47a7007fe4e4551456cba3547d64759be2923911 SHA-256: ef1b9fcd9bb1c8cf70fb8c852a5910a2f4bd6b982698026c97bd73c2ada4679d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farms suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://oniceh.ru/uplcv?utm_term=omron+e5cz-r2+manual PDF link annotation
    • http://lejonhund.com/upload/43819557123.pdfIn PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/73412733142.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/ulbbq2fdmuh53mvddmv0vb5baf/8630291185.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/pujanerupomuba.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd14915012---judagozimorolodomo.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a0645b87f---deloxozo.pdfIn PDF document text
    • http://lotusburbank.com/uploads/files/lagogiwufopokog.pdfIn PDF document text
    • http://furniture83.com/upload/files/77463222446.pdfIn PDF document text
    • https://zulapin.com/calisma2/files/uploads/xivifojizafolesiga.pdfIn PDF document text
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/mirijexisejoxavofug.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/32122672240.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820e6410366---60308344446.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/juzevunewajetagerabuf.pdfIn PDF document text
    • http://ccsup.co.th/uploads/ckfinder/files/ledoravurojezaxozuruwe.pdfIn PDF document text
    • http://retailcop.ca/files/xarogelanedobewenuzuwo.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/luwinibezazek.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/6686000746.pdfIn PDF document text
    • http://streathamtaxi.com/survey/userfiles/files/60864330930.pdfIn PDF document text
    • http://ovodatar.hu/userfiles/file/gisemogezujaripa.pdfIn PDF document text
    • http://colokit.thienlonggroup.com/Images_upload/files/24753247182.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/fizoge.pdfIn PDF document text
    • https://aiwatopup.com/ckfinder/userfiles/files/14208353984.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/jitikitilepejemidates.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/c598aa0cc93a014ff8b32bf34b92fd76/13437677063.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/71934028486.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_off0000bb49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD360 10508 bytes
SHA-256: 9fab8ce039812685b96835247e725a2c4a5f1ec81ef419abfcdb45295e653ae4
font_02_sfnt_off0000eb67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB67 17760 bytes
SHA-256: 97cce8666b856d1b51ffc3808c3b2af0120b6e1217da39943fe3051b852acecf

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