Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a8df3ced2544345…

MALICIOUS

PDF

46.9 KB Created: 2021-10-11 02:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 0d3792b09c83633b93d918de99c2ad62 SHA-1: 0bcd8050959d601b2c6dab81a1e9bcdd8a256d86 SHA-256: 7a8df3ced254434537005c3f565fb2db1da5f95d60a57662a25a2514fa351cb6
154 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with multiple URLs pointing to potentially compromised websites or disposable hosting. The presence of numerous links, including one hosted on a compromised CMS upload directory, suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6210

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://portaldeaquidauana.com.br/ckfinder/userfiles/files/4115446012.pdf In PDF document text
    • http://oawebserver.com/piceditor/file/81164276384.pdfIn PDF document text
    • http://rpelektromont.cz/admin/obrazky/file/xebobuf.pdfIn PDF document text
    • https://ceccargiurgiu.ro/userfiles/file/14172262961.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1614d4a79b6b64---dafufukejanubuveviwixun.pdfIn PDF document text
    • http://fashionflutters.com/ckfinder/userfiles/files/guwowilogadozepadexov.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161342dbb1d98c---xiximizurununejuvigu.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202109271148149036.pdfIn PDF document text
    • https://mygoaltv.org/ipp/images/uploads/files/24381010222.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/11c6cf297bcdcbd2226502940b13d133/nutetunavilapavavepu.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/69069683172.pdfIn PDF document text
    • http://kfbma.org/files/fck/file/kewunesogogodit.pdfIn PDF document text
    • https://senfina.top/uploads/files/wuzanuvezekolu.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/lefibakabosikunagog.pdfIn PDF document text
    • http://hakanhurdacilik.com/userfiles/file/nolomozovitupuguzalobol.pdfIn PDF document text
    • https://babamansurkurhuseyin.com/uni/yuklemeler/file/29008776513.pdfIn PDF document text
    • https://mistral-paints.cz/userfiles/files/3565014883.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/joxewemoriwojenapag.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/89723715318.pdfIn PDF document text
    • http://saveondealz.com/ckeditor/ckfinder/core/connector/php/uploads/files/pigige.pdfIn PDF document text
    • http://transgusto.ch/userfiles/file/vewuva.pdfIn PDF document text
    • http://westhollywood.ilovepokebar.com/uploads/files/92338518281.pdfIn PDF document text
    • https://goez3.com/10005001208290177/ckfinder/userfiles/files/bekekan.pdfIn PDF document text
    • https://marmetal.cevhertemizlik.com/userfiles/files/21448218442.pdfIn PDF document text
    • http://scarpatti.com/files/15157963321.pdfIn PDF document text
    • http://rentaruedas.com/files/others/gedezudupamineligix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+skyblock+hypixelPDF link annotation

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