Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb45295348f5586f…

MALICIOUS

PDF

79.9 KB Created: 2021-09-12 00:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 2c0acc3a36f24dba0229d4f8a032d7d7 SHA-1: 56dfdf78813297a947c125f433cdb7c4728a5bee SHA-256: eb45295348f5586fec9ba9592fcaa4060c07b3fcc4635c6997a8827b76019843
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 0.9960

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://congtydaihai.com/upload/files/nijogikobugituzo.pdf In PDF document text
    • http://wamaeassociates.com/images/uploads/originals/file/11179302021.pdfIn PDF document text
    • https://avukatwebsitesi.kocgrafik.net/upload/files/69320290718.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/37731872207.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/rikuzeliwonova.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/dogije.pdfIn PDF document text
    • http://rkenterprisesonline.com/FCKeditor/file/96905334166.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/26643725951.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/bagiwaxelebodufumebaf.pdfIn PDF document text
    • http://vinhhangvien.com/upload/files/beruwem.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355653ccd3b---dakokapo.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/82181892065.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/noxug.pdfIn PDF document text
    • https://livbiopharma.com/userfiles/file/rerurobonefulivene.pdfIn PDF document text
    • https://batdongsandothanh.vn/luutru/files/wonimonoruwiwopipajufed.pdfIn PDF document text
    • https://maintogelonline2.com/contents/files/46739550725.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/fitawuvurefevesed.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/65681113958.pdfIn PDF document text
    • http://razzledazzleevents.in/userfiles/file/zuwajikiwizadulirawip.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/guzinufewigafuzameka.pdfIn PDF document text
    • http://holzbau-napetschnig.at/3810575550.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/soriforefuman.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=romeo+and+juliet+full+script+pdfPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD558 11056 bytes
SHA-256: c78e432a7c4052725fc7fa2ddbfd8b531d48a1b5b07bfd6c4ef85b3b9cdfc6b8
font_01_sfnt_off0000ef03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF03 16936 bytes
SHA-256: 89efb5258c72a4d318a560485d7368c8ff408ff1e8dfb84c1a1e5573283843f4
font_02_sfnt_off00011a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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