Malicious PDF — malware analysis report

Static analysis result for SHA-256 88a461ffefaf03ae…

MALICIOUS

PDF

54.6 KB Created: 2021-09-25 20:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c61d84afeb6a5c8c8e11b15c717d9532 SHA-1: 6b49802dba8f6bc59886e22cf84d09564fb66aa0 SHA-256: 88a461ffefaf03ae5321577549fa502ebfcb7d4918002fdd03a5f58434a00f6a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious content. The presence of numerous embedded URLs pointing to suspicious PDF files on various domains suggests a link farm designed to distribute further malicious content. The `PDF_SEO_DISPOSABLE_LINK_FARM` heuristic specifically highlights the nature of these links, indicating a potential phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5305

Heuristics 4

  • 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
  • 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://ssaisarang.com/ckfinder/userfiles/files/26093292674.pdf In PDF document text
    • https://implantologie-deva.ro/app/webroot/files/userfiles/files/17202260443.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/40533517310.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/vuwazabed.pdfIn PDF document text
    • https://darkoyunpin.com/calisma2/files/uploads/31207735834.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5ea9a5a5e---fegawugezakerisegil.pdfIn PDF document text
    • http://dc-42351dc5a6b3.prshots.es/uploads/userfiles/1630764189/files/vorudi.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/divenunu.pdfIn PDF document text
    • https://ms02bet.com/contents/files/zetuwuzebepim.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/84255844865.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/52b9b3cdcd2d190ea974e213c073d2e0.pdfIn PDF document text
    • http://masterkontroll.hu/ckfinder/userfiles/files/legetijurodolavizof.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/mopotafamojujilejem.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/xenonivokigo.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/fezufug.pdfIn PDF document text
    • http://stelmart.ru/userfiles/file/wamorigavelilobowitobavot.pdfIn PDF document text
    • https://equinox-e.com/upload/files/bokonoj.pdfIn PDF document text
    • https://www.zochrot.org/ckfinder/userfiles/files/86331055651.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/54987011493.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/161429068c69a0---vakobemo.pdfIn PDF document text
    • https://araprinter.com/ckfinder/userfiles/files/zovusirise.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/sogimexigesixexojunapok.pdfIn PDF document text
    • https://tele-video.ru/upload/files/nedatur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=call+of+duty+download+apk+2021PDF link annotation