Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4a5fe01331511b5…

MALICIOUS

PDF

46.8 KB Created: 2021-09-25 22:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 12e09aeb52b5f7c87b48511aa99027c0 SHA-1: e2b062e3df36899a1891c8a67ce0c9eecf1ca59d SHA-256: e4a5fe01331511b51213f21a67611f356f758ff35c323603cb946dd2a23b2c20
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing embedded JavaScript and a large number of external links, many of which point to compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6295

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=horizon+forza+4+apk PDF link annotation
    • https://confeccionesruiz.cl/UserFiles/File/60040704910.pdfIn PDF document text
    • http://pevak.info/UserFiles/File/46334225250.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/xilibawevofabunasaba.pdfIn PDF document text
    • https://www.natursany.com/ckfinder/userfiles/files/15167003190.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/51065418998.pdfIn PDF document text
    • https://tidaksusah.com/contents/files/vatufekapawumif.pdfIn PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/bipobapawajosu.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/nazukapedifulajepaw.pdfIn PDF document text
    • https://nghiepvu.udicmanpower.vn/uploads/news_file/pawogul.pdfIn PDF document text
    • http://www.ks-klinika.ru/ckfinder/userfiles/files/matoxemulifanavebaxijuput.pdfIn PDF document text
    • http://cobmedia.hu/include/wezibalifuvijowemajisan.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/87749156602.pdfIn PDF document text
    • http://w3-japan.com/js/upload/files/11270125187.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16130bb2c65d14---28982421325.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/vurese.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/2118525411.pdfIn PDF document text
    • https://v-rshine.com/upload/images/files/33454676505.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/2ad5aead84b1e4e7a4c31e3aaf7fd962/48289346228.pdfIn PDF document text
    • https://omnistopbollards.com/application/third_party/ckfinder/userfiles/files/jofevefeturejebaj.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/437ef01e971f66af4c153ea999b0de9c/29399755198.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210916013250.pdfIn PDF document text
    • https://inprovitperu.com/ckfinder/userfiles/files/batanemopasepizogovivomal.pdfIn PDF document text
    • http://0225674989.kad.tw/kads/ckfinder/userfiles/files/jidopagusapubivokapa.pdfIn PDF document text
    • https://illustrations.noche.fr/images/files/sirovedaxebobiwitojofeli.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/xemazumazigaz.pdfIn PDF document text
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/patevib.pdfIn PDF document text

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