Malicious PDF — malware analysis report

Static analysis result for SHA-256 baaad7cbf7ec7ae2…

MALICIOUS

PDF

79.2 KB Created: 2021-09-18 13:35:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 1be232127c8043711fa082272fdb6f3a SHA-1: d1bb7028ae449f494257d8673f23717f96b3b0f6 SHA-256: baaad7cbf7ec7ae22c41fb19d118f96256a18d548fe3026ab5ca0ecf5af527c9
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 0.9975

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
  • 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 http://synergyproperty.com/images/files/waleziw.pdf In PDF document text
    • http://vinhhangvien.com/upload/files/gisatoxo.pdfIn PDF document text
    • http://adice-area.com/pictures/files/92784050890.pdfIn PDF document text
    • http://vaynhe.com/upload/files/28412903253.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/xizilapiwurugaxaxi.pdfIn PDF document text
    • http://hflchw.com/upload/file/lotiporumobizexefofugo.pdfIn PDF document text
    • http://nhasachconggiao.com/luutru/files/mexojo.pdfIn PDF document text
    • https://innovativallatgyogyszer.hu/fileok/file/jejovoxut.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/78933703858.pdfIn PDF document text
    • http://www.ambatownship.com/ckfinder/userfiles/files/6146198032.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/pujivan.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/rejigi.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/48867ef5b504818bb0c15063b44668d6/37357405794.pdfIn PDF document text
    • http://gpsputhuppally.com/userfiles/file/wazabakemage.pdfIn PDF document text
    • http://gainliving.com/upload/editor/file/wawukuso.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/49052445334.pdfIn PDF document text
    • https://festacontinua.it/public/file/wipav.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/e80473df943f535f6b6a084fa24a400a/gafujakitifetedogokosen.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16137197d4a6c5---filuwaxeferele.pdfIn PDF document text
    • http://coomargroup.com/ckfinder/userfiles/files/32485667990.pdfIn PDF document text
    • http://lj-group.cn/upload/files/titawiguxokawuvurepum.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/rubarulenupoxu.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/setalokegojaneral.pdfIn PDF document text
    • http://konferencii.org/js/ckfinder/userfiles/files/7397657263.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=types+of+histogram+shapesPDF 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_off0000d231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD231 17072 bytes
SHA-256: a643cd2ad8c01184e579f6d520ae8c12cc3fde3b1927be1bdf577eaa313832d4
font_01_sfnt_off0000fe72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE72 10732 bytes
SHA-256: 5fe868ab6c5fcf9ebc81068626053bc2c6991388d23b3be522699bd36fbd81d8
font_02_sfnt_off00011739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11739 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1