Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb1ff9319aae6eb…

MALICIOUS

PDF

60.9 KB Created: 2021-08-13 17:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e489ad9c3701e013d7c628745c0a4379 SHA-1: 34b17aef814b71b1a68b9c83ee199ed7544d7f51 SHA-256: bcb1ff9319aae6ebca2749bde9d1675f1d14239e9cb4f108ab8bc21502d4c21e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories or disposable hosting, characteristic of a link farm used for phishing or malware distribution. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7119

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 http://51-lq.com/userfiles/file///3229490131.pdf In PDF document text
    • https://metricgroup.it/uploads/file/51794411251.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16090b77cc2965---dedenaxapuda.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/d5d3jsjv2jofhl6mp2b7ot82ft/2171604028.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/gudipigobiguvofufo.pdfIn PDF document text
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/nonox.pdfIn PDF document text
    • http://shiinamotors.com/js/upload/files/45581152147.pdfIn PDF document text
    • https://atrax.hr/files/rozogogef.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a65f1d9f82---kuwonugafokeza.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/bf63e1900407091be4217abff6834d75/25203871633.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/subinazavurejidufisola.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1606f59ec7e15c---rikokurusedozajeriguk.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/31616234670.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9c03a206d---66070457982.pdfIn PDF document text
    • http://erictex.com/ufiles/files/pubotadejopole.pdfIn PDF document text
    • http://3sdent.com/upload/files/42303351081.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed51d9a0700---pedexerevaxavovi.pdfIn PDF document text
    • http://thegioioto.store/upload/files/38746310882.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/1260911672.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/varitope.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+check+automatic+transmission+fluid+levelPDF link annotation

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