Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0e967209f343cf…

MALICIOUS

PDF

79.4 KB Created: 2021-09-14 04:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6356e9ec515e6f570cc5b84431ac7370 SHA-1: 237be09360704a23d23aabb7df62078f0fc73376 SHA-256: ce0e967209f343cf2a6098396ca4482e935061b2df9514bd6b143f621c1cfff3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics, including ML classifiers and ClamAV, indicating malicious intent. It contains numerous embedded URLs, many of which point to suspicious domains, suggesting it's part of a link farm designed to redirect users. The presence of PDF-specific rules like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggests it's used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 5

  • 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.
  • 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://chataigne-cevennes.fr/imgs/files/givojojen.pdf In PDF document text
    • http://meditopthailand.com/file/bebalafugi.pdfIn PDF document text
    • http://artiguardia.pl/userfiles/file/roroxejutujubamiliki.pdfIn PDF document text
    • http://bolshunoff.ru/images/wysiwyg/file/6415142629.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/tupowasodin.pdfIn PDF document text
    • http://haisushitogo.com/uploads/files/72636958729.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/10096403706.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/68382807417.pdfIn PDF document text
    • http://clingac.es/d/files/61597093725.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/9203243559.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/vaguwa.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/dejalerabutisujaxekod.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/gilokitevixabaloxe.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/zimudupadibeduragelopina.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/71721694471.pdfIn PDF document text
    • https://tdemo.order-pro.com/ckfinder/userfiles/files/ruwuxupage.pdfIn PDF document text
    • http://gizmakina.com/depo/sayfaresim/file/famoj.pdfIn PDF document text
    • http://jplus-ag.com/upload/files/BodyFile__613165D02187B.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/28319441084.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/43380358435.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/safivuve.pdfIn PDF document text
    • http://eventechsite.com/files/files/jinelopobodoz.pdfIn PDF document text
    • http://msdoubrava.cz/foto/images/file/58369968997.pdfIn PDF document text
    • https://aayams.com/userfiles/file/xawozewegoxinewexogamow.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/gutunotujemineseva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=open+chord+diagramsPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161381993cd724---77649089116.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_off0000d3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0C 10844 bytes
SHA-256: 02b14f1451e6360ffbf40fbd1fe962eca58fa2cf9681e972af58d2e4f9169935
font_02_sfnt_off000104a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A3 16920 bytes
SHA-256: b6090406107438f11f4b68a6cef44f02892ffd7896c3d4573556e4c0a170df4b