Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db7030498e929c9…

MALICIOUS

PDF

69.1 KB Created: 2021-09-06 21:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2647286849801b5ab9bbbc4daa6cd6a8 SHA-1: e839b8372a3232052eecd44b671f53150d9707ee SHA-256: 0db7030498e929c988dd92c0878eb935056ccef09ceede90e54d144b5e5e91f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm with numerous URLs, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious sites. The presence of multiple external URIs and the nature of the URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://bazis-expertiza.ru/ckfinder/core/connector/php/files/47830474686.pdf In PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/5tgf6htos4hkrbspbkqqm1king/buxufukekuzaja.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/546dd628d5063fdd284c7c9089aad1bc/72273172308.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/m8eskorj3ka61mhq2bal9nsr32/69190393935.pdfIn PDF document text
    • http://antropolog.ru/userfiles/file/pixezekafopomiwotupunajim.pdfIn PDF document text
    • https://homecareangels.ca/files/files/files/pibixesilekosode.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086043fc3976---63480817369.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/bekilexofujupipol.pdfIn PDF document text
    • http://kimhoatra.vn/upload/fckimagesfile/56708859999.pdfIn PDF document text
    • http://dzbnf.com/upload/file///piveruzavebefif.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/zozizemikabo.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/ronut.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/be5a39bdb88e99d13c404c1d4de83711/99099788644.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/vijufixamop.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dabad851fde---zaxesiliv.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/917e4d1d4745d5bf03c882eec7f63bb1/losiwolumuxoxozepanu.pdfIn PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/62373802392.pdfIn PDF document text
    • https://smilepaper.tw/archive/upload/files/kugigiwokedesifux.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/cb43e7623eac83d143375e74f69c9e64/29622101428.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/galovisivumim.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/1375376938f57f52f85a9a3ab0ec1d8c/duwejotubi.pdfIn PDF document text
    • http://vantaidongsaigon.com/uploads/files/rixemuposavosa.pdfIn PDF document text
    • http://mexxeopaint.com/upload/files/71289162186.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/xurujuxugurikaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=fenix+6+pro+manual+pdfPDF 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_off0000b18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB18A 14620 bytes
SHA-256: dc69877578c0b5bb67af0c5381d8c6b9329539f6b72b6b7af29d1cc461e09a09
font_01_sfnt_off0000d693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD693 10740 bytes
SHA-256: 1b50fbfee0b94e45574496391efb7326ccc78e67be4a6fe18118e2fba77de9ca
font_02_sfnt_off0000ef32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1