Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d586a4e5ca10665…

MALICIOUS

PDF

81.9 KB Created: 2021-09-11 09:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: c2a48e2c397b1ed5ff60bb82f6f42c01 SHA-1: cd06c941917516869dfd497944e49ededeca4ae6 SHA-256: 9d586a4e5ca10665101b209ac140a75bc717865017397d8900d988510d9d22c9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://laborke.ru/uplcv?utm_term=nice+words+that+start+with+an+m PDF link annotation
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a77bae3f55---89725270552.pdfIn PDF document text
    • https://franchisebusinessadvisors.franchisebrokerwebsites.com/broker-site/files/files/61013967998.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/96890801387.pdfIn PDF document text
    • https://impulsa.mantareys.net/uploads/plantillas/files/rawani.pdfIn PDF document text
    • http://bayernglobal.de/userVZ/file/lamepexizorinowitatoposa.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/nikukuwapojoworef.pdfIn PDF document text
    • https://priscar.com/documents/files/18302602742.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/witaluluzitobofememor.pdfIn PDF document text
    • https://oreopay58.com/ckfinder/userfiles/files/kowepexaxamiwanavulupeso.pdfIn PDF document text
    • http://baozhaopharm.com/upload/files/gererezerizakezubabi.pdfIn PDF document text
    • http://vindindex.nl/images/uploads/23539027807.pdfIn PDF document text
    • https://www.agcontraincendios.es/ckfinder/userfiles/files/39510993584.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/paxaxanunedir.pdfIn PDF document text
    • https://equalitas.es/userfiles/file/55894368523.pdfIn PDF document text
    • http://steakpluspizza.us/userfiles/file/67118622950.pdfIn PDF document text
    • http://luijkzonwering.nl/image/file/33412079271.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/wozeforerowe.pdfIn PDF document text
    • https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/92950149352.pdfIn PDF document text
    • https://rjpexport.com/files/ziwubotojowepilu.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/43103171216.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image/files/61551244544.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/oc4e9fmmrg1hlel5uvq24jjqc5/wemenuwojisedepe.pdfIn PDF document text
    • http://blankheich.de/images/uploads/file/xoratezuponutuw.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50C 17308 bytes
SHA-256: c8676a563bec8325478bb865905e8b1717e417277a65d989b5412f7604d64e19
font_02_sfnt_off0001215e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215E 10652 bytes
SHA-256: 183126c6179e4200b1f9076a386303e7383e10dc6e44a795f6d8d6aa45e9a6e3

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