Malicious PDF — malware analysis report

Static analysis result for SHA-256 176e7afc319697f8…

MALICIOUS

PDF

71.3 KB Created: 2021-09-20 15:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: a875793c5709f5de47873b1589ce0879 SHA-1: e3d34f9fc2d290c3c1c7241bcd84478d14b36213 SHA-256: 176e7afc319697f896aabbd987e73e762cced9b1f4f93f8c37470c8826cbca13
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, such as phishing or malware distribution. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the overall structure and URL distribution strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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.
  • 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://nomylo.ru/uplcv?utm_term=illegal+online+streaming+sites PDF link annotation
    • https://mbzgogo.xyz/web/img/podborky/files/63753172339.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/jotorobasagosilapufavane.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/wozaxejewus.pdfIn PDF document text
    • https://endeligmandag.no/e-brev/data/div/kiwipejisekusebi.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/nibed.pdfIn PDF document text
    • http://masonhn.com/d/files/730044695.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/95935439904.pdfIn PDF document text
    • http://nachhilfeschule.havonix.com/ckfinder/userfiles/files/98133658063.pdfIn PDF document text
    • http://sourceit.ke/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/48528661577.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/80410384873.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/zuvawefu.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/kosezeredotub.pdfIn PDF document text
    • http://tecksco.com/upload/files/96409346277.pdfIn PDF document text
    • https://juraganmonyet.com/contents/files/23302023807.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16147a16ab890d---44207368586.pdfIn PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/71645095011.pdfIn PDF document text
    • http://besteva.com/upload/files/wasujolirawuxokote.pdfIn PDF document text
    • http://viviapalermo.com/userfiles/files/xasami.pdfIn PDF document text
    • http://cargologicru.com/sadm_files/xobumukusivokajoni.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/13663506736.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6c95e15e9---dubezofinojexajerulo.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB80D 15852 bytes
SHA-256: 7e7c49424f8775f2e304eb3297d3bc586391b603e978e0c179d3fbff703dae53
font_01_sfnt_off0000e072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE072 10404 bytes
SHA-256: 0c290986b388ab5bfb8742b05fc7aa58790e6114b13ba5ab361eeb23c989ef1b
font_02_sfnt_off0000f7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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