Malicious PDF — malware analysis report

Static analysis result for SHA-256 3105cb861fb9539d…

MALICIOUS

PDF

63.5 KB Created: 2021-07-14 04:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9570ae28c6be2cb9f9e0e6220dd757f4 SHA-1: d42ddddc9e2c49c7733dc789315047fee52822ad SHA-256: 3105cb861fb9539d1c7c619754a128b9759e9bfe1dc5f6ede35b79880db44186
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised or disposable domains. These links form a link farm, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier also indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5405

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://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/4ff4e2499f0bc2c09b163b7bbc2b8586/79049539066.pdf In PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfabfe6b813---bozapukudub.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/sipakikokubovisulutiluj.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/lowowopapiwo.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9955a4f5cdbd9db8ddd1eb49f7981226/virisujonakuba.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721633869fa---fezevu.pdfIn PDF document text
    • https://belhasasecurity.com/userfiles/file/6354212506.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160882fddbcbde---roguzaxawulizanajap.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160a4649d5b5b7---vamekudoz.pdfIn PDF document text
    • http://cycling-software.com/files/file/begawup.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/34775305656.pdfIn PDF document text
    • https://livre-d-art.com/ckfinder/userfiles/files/52749415251.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/c67e188d4a4f22311a8b803bb580f9e8/18256610403.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/zizalitunofadowifok.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1607960332abf7---1131338438.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1606d33b9a8052---66661722350.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/fapuzosuxogepodewu.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/92693817740.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/59297217707.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/i6dl8vfsf6a8qom2u9b8i73of2/75509829962.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/68764269768.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/savitudasijebopi.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/149da5c41f92ca061d8a5c21b6e8521c/37962581572.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/8770067293.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/12744253092.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=if+plead+guilty+are+you+convictedPDF link annotation

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