Malicious PDF — malware analysis report

Static analysis result for SHA-256 170ee7a43789c675…

MALICIOUS

PDF

42.0 KB Created: 2021-06-10 10:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d9bfe18096f207ce904c2531695e062e SHA-1: 3768fba478ec3fe1810d663f4360bc0ddfab075e SHA-256: 170ee7a43789c6756cc8dc251839a8cc50af4d5a98fb7119c0cf4675e56d9045
204 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8830

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 42 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://wastran.ru/pbw?utm_term=call+of+cthulhu+7th+edition+keeper%2527s+handbook+pdf PDF link annotation
    • https://xelipifexejup.weebly.com/uploads/1/3/4/8/134848770/f082060d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450512/normal_606a37d00f505.pdfIn PDF document text
    • https://funovupudejo.weebly.com/uploads/1/3/4/4/134473131/751136.pdfIn PDF document text
    • https://gosasaweju.weebly.com/uploads/1/3/1/3/131384289/wuxugusegusan-welef-tarexezubi.pdfIn PDF document text
    • https://beginuvemosuso.weebly.com/uploads/1/3/4/6/134699988/3fe5e41d.pdfIn PDF document text
    • https://lixotesit.weebly.com/uploads/1/3/4/6/134655402/de579d3ff3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388818/normal_60c0f00fae0d9.pdfIn PDF document text
    • https://powufekati.weebly.com/uploads/1/3/4/0/134012492/7649362.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418590/normal_6004cfc465cfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385217/normal_60381fad57890.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463263/normal_5ffa9d48b9d8a.pdfIn PDF document text
    • https://gakafapokizi.weebly.com/uploads/1/3/5/3/135319358/7542937.pdfIn PDF document text
    • https://bimomudunaxa.weebly.com/uploads/1/3/4/7/134757379/de5f74bd2abff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494451/normal_5fe8aa974c3a9.pdfIn PDF document text
    • https://fupuvoriru.weebly.com/uploads/1/3/4/4/134494751/xeporopudibop_tikulo.pdfIn PDF document text
    • https://wutupebepa.weebly.com/uploads/1/3/3/9/133997315/181244.pdfIn PDF document text
    • http://bovojigu.pbworks.com/f/33215753141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9763e20-b4f8-48dd-90d7-b673e0fecbc1/how_to_write_a_book_for_someone_you_love.pdfIn PDF document text
    • http://lipovosufuk.pbworks.com/w/file/fetch/144782634/difference_between_simple_present_and_present_continuous_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ecf0bca-eb22-4828-8318-6bb15c93b709/stihl_032_av_specs_cc.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144425712/burglar_alarm_project_report.pdfIn PDF document text
    • http://lesokulovisu.pbworks.com/f/fhrerschein_formel_bremsweg_reaktionsweg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faca5e2e-4466-457b-bac4-d13d67f02d85/how_many_hours_to_get_journeyman_electrician_license.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab06dc6a-57d4-4abe-944f-540b58f1e99c/what_does_you_are_dead_in_the_water_mean.pdfIn PDF document text

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