Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef6f2d81327469da…

MALICIOUS

PDF

46.8 KB Created: 2021-09-01 17:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d3501818c53fed0e2e7850e1be7e57a5 SHA-1: dcf444740f780fffc2287e7e48ac2069545719d8 SHA-256: ef6f2d81327469da0fedb8405781f3976f201118630184362d50113d2b5164d2
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were extracted, the structure and URL targets indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7035

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
  • 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
  • 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://gimnazjum-krasiczyn.pl/img/userfiles/file/81054477108.pdf In PDF document text
    • http://se-ty.ru/uploads/userfiles/file/85128697189.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/iecnnl43gme7em3gsgqc3te1gv/27457047756.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/muxojevotegujones.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/wepumi.pdfIn PDF document text
    • http://wingmanplanningdemo.com/userfiles/files/tilitigefonijipizuruli.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/241f6e700da73295ae4b1a10f083e087/46607517787.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/30729475659.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16119cb5e0303e---xekuvusogamorizatadasagud.pdfIn PDF document text
    • https://www.weboonline.com/ckfinder/userfiles/files/zumawevado.pdfIn PDF document text
    • http://imi.vc/upload/files/5924627261.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/4b6190a2508b56503e083945765b740f/boretovaraf.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073a9ff39bf5---lewuruninazeropawu.pdfIn PDF document text
    • http://crmloccitanecr.com/campannas/file/xereroxow.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/72969634267.pdfIn PDF document text
    • http://vigen12.com/userfiles/file/difejejulifedij.pdfIn PDF document text
    • https://asthasupermarket.com/userfiles/file/pigunatulibijefi.pdfIn PDF document text
    • https://www.assofmt.org/ckfinder/userfiles/files/bupunofajagunifudowamapem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+long+does+bls+training+lastPDF link annotation

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