Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a2be7f02f8a2d0…

MALICIOUS

PDF

70.2 KB Created: 2021-07-14 04:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 65c6a505f4f3a36f9d4721c79765e6e1 SHA-1: d31b46c036555fafc16b40cb31b96760d606a21e SHA-256: c0a2be7f02f8a2d07d3882822ba5aa9f891a9a9dc8ebd2d42006add99a46ab26
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains embedded JavaScript, which is often used to execute malicious actions within PDFs. The presence of a link farm on disposable hosting and compromised CMS upload storage suggests a redirection mechanism to deliver further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6630

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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CF 10856 bytes
SHA-256: 4abdef9fc41c66bdfdcb8ed505e347859243b6e2637ef5ae309e42b6bc4652a2