Malicious PDF — malware analysis report

Static analysis result for SHA-256 30631b460d2a2eba…

MALICIOUS

PDF

56.8 KB Created: 2021-09-03 21:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5b02f6edd6819e7231f2a8d65285c06f SHA-1: f036b0a1eec426b2f22483cbd92fc1d90f0366d9 SHA-256: 30631b460d2a2ebad7132dd375c26622ae240c1492a6af7e8d76c793e4c0536f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to initiate malicious actions or redirect the user. The presence of multiple URLs pointing to compromised CMS uploads and disposable hosting, coupled with the ClamAV detection, strongly suggests a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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://tucarrorentacar.co/ckfinder/userfiles/files/21173235232.pdf In PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/02biq6ro09rbuacl9vt9r55l4b/76677924740.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d3310bcd1---jajolobabopovulodu.pdfIn PDF document text
    • https://hitpoint.tw/userfiles/file/36919775399.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/4748383159.pdfIn PDF document text
    • https://csn-alliance.com/data/files/bukewatupezagu.pdfIn PDF document text
    • http://ubest.ru/images/file/vufuvasorotu.pdfIn PDF document text
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/bobukebalutekado.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/64c2932c2ca3b23bae8a7619a6807000/67034876756.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/5bd7dbc73cdee81bf190253a7bc16023/94719355473.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/16955601288.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/4ac89cc20112f623aa4e9d089af2e6ca/zimizam.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/75617161751.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/ef167a1941079bd9ac6e6a8af0de5e45/80547825822.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/zenuda.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/68116450835.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c721f0fdf---23071723151.pdfIn PDF document text
    • https://farmstead.tw/farmstead/upload/files/mubibiwedopeti.pdfIn PDF document text
    • http://matras-devison.ru/upload/file/gabevuxabujidizopura.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2cb7ea2d5---5898774583.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/85098051456.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ae452040332---marafusiradenex.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/5v5086r0q0ri15oaevdprkdc14/mejenedigaduzelaluduv.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dbae3c86b0b---satapewefijakononog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=types+of+intermolecular+forces+of+attraction+pdfPDF link annotation

Related samples 8

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