Malicious PDF — malware analysis report

Static analysis result for SHA-256 0517abda40c7a7b5…

MALICIOUS

PDF

74.7 KB Created: 2021-09-20 02:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6ee300ef5cb9f5462808d50499882db3 SHA-1: f383347010e405692575034453880a000a68e818 SHA-256: 0517abda40c7a7b5c7c2b92309ec6440829e8a10ebb1b17a9f334f1b37691dbc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the suspicious nature of the embedded links, suggesting a link farm designed for SEO manipulation or to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://smidgel.ru/uplcv?utm_term=best+avengers+wallpaper+for+android PDF link annotation
    • https://karinbentum.nl/uploads/file/zesumulepijatovoselare.pdfIn PDF document text
    • https://madeirashopping.com/userfiles/file/derarililenowemasi.pdfIn PDF document text
    • http://lerucherdesanges.fr/userfiles/file/nabegeri.pdfIn PDF document text
    • http://prota.ru/upload/files/47658843149.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/muxawux.pdfIn PDF document text
    • http://hftyby.com/upload_fck/file/2021-9-6/20210906231252603142.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/wodejizupes.pdfIn PDF document text
    • https://dongcohonda.com/userfiles/file/metusigalop.pdfIn PDF document text
    • http://www.moyekolodin.com/files/boposabowamafugu.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/niwomipofibiwesaxurelowi.pdfIn PDF document text
    • http://eszixv.hu/ckfinder/userfiles/files/jevezo.pdfIn PDF document text
    • https://semut73.com/contents/files/98396585048.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161403a9e6d206---jabifuwoga.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/42113601533.pdfIn PDF document text
    • http://pietrek.com/MARCUS/files/file/55385923479.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/mozuvinef.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/xeget.pdfIn PDF document text
    • http://dieutrimun.myphamkangnam.vn/webroot/img/files/kobizujepuzamifu.pdfIn PDF document text
    • https://onlinendttraining.net/files/87367136940.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/19214161268.pdfIn PDF document text
    • https://pacientes.quiroser.com/UserFilesQUI/file/30734811690.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/73650428899.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/n57d4a8lc1uv6qr5fihh65gs1m/14664386725.pdfIn PDF document text
    • http://whatcanidoforyou.eu/publish/file/rurolexizisedudokalasu.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/19916805934.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_off0000c03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC03D 17156 bytes
SHA-256: d545b95d404ab637a60bd13abc98a8dcb6de80960a08042adb10681190a122d9
font_01_sfnt_off0000ec37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001044e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044E 10880 bytes
SHA-256: 238d5a36cbc264391032cfbe3426e3ca8f81c201618653c3bfa4b16cee148473

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