Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc0f5719dfbee4d…

MALICIOUS

PDF

75.9 KB Created: 2021-09-19 09:32:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a225734ba489629ee319d7c87dc65929 SHA-1: 56177b19827917efbc97e4123716072c14213000 SHA-256: 7cc0f5719dfbee4d6b5ec4d4fe8219debd4b9d2bcaab710c8d4fb11fa9ec552c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other domains, likely serving as a distribution point for phishing or malware. The presence of embedded URLs and the PDF structure suggest an attempt to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://ailani.org/wp-content/plugins/super-forms/uploads/php/files/8e942588d366d4bcdafcb6e5549f3d15/82639200733.pdf In PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/a66a426ebfd580b855abe74bf2761a08/xovoreduvogigiweku.pdfIn PDF document text
    • https://panama4d.com/contents/files/muxodekulugu.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210912051531.pdfIn PDF document text
    • http://marine-inox.com/i/File/26149876192.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/161404674943f2---75970110026.pdfIn PDF document text
    • https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/59670822662.pdfIn PDF document text
    • https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/97902265663.pdfIn PDF document text
    • https://nstoplana.rs/ckfinder/userfiles/files/xegawotomeguzopozamuxa.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios/files/77435776986.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/lonijubexixafiwaz.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/898605580c01aff9c2777ab4e007006b/mavujo.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/rokerisuxevividi.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/dirajumajudumikedenimifa.pdfIn PDF document text
    • https://griby.biz/ckfinder/userfiles/files/desufekunuboruveweriwofaj.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/84000534902.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613beac7a2ca3---89225744744.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/6e0e2ce8dda8ff6b661872fe7f146688/68521446905.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/kezobefox.pdfIn PDF document text
    • https://kemxoi.vn/app/webroot/files/images/pages/files/faxivos.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/patuxoxulazeta.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/novuvologalu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=gunship+battle+warfare+mod+apkPDF 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_off0000c1da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1DA 11220 bytes
SHA-256: 037ac487b8f99fcf4df565029088f0c5629cef82093a6104d0b64374c91f3bfb
font_01_sfnt_off0000dbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCB 17628 bytes
SHA-256: 1e24d2ac222adf72dba2936ef9aaede55aa7ed12071081fe7877d17a84a3d799
font_02_sfnt_off000109d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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