Malicious PDF — malware analysis report

Static analysis result for SHA-256 050de5c65a0f4653…

MALICIOUS

PDF

66.4 KB Created: 2021-09-19 23:48:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7854c9dd98bba70262f9a1895070261a SHA-1: 82513ea744f5089f958bfe78c7398079d2c5366e SHA-256: 050de5c65a0f46532ea9c931d1f4997fa3b826f499025fd7ba8574b5f8697005
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a critical heuristic firing. It contains a large number of embedded URLs, many of which are hosted on disposable domains and utilize UTM parameters, suggesting a link farm or phishing campaign. The PDF structure and embedded links indicate an attempt to redirect users to external malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4625

Heuristics 4

  • 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
  • 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://irlanc.ru/uplcv?utm_term=social+groups+near+me PDF link annotation
    • https://fanaf.com/article_ressources/file/dagoxavolorovigegala.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/semalafavu.pdfIn PDF document text
    • http://karinameal.ru/imgdish/files/56642273175.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/kexanuf.pdfIn PDF document text
    • http://flynewsletter.com/uploads/file/98959419714.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/6964219619.pdfIn PDF document text
    • https://tanvietnamdinh.com/uploads/files/36609296996.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/60867100918.pdfIn PDF document text
    • https://embassyinvietnam.com/webroot/img/files/87342855096.pdfIn PDF document text
    • http://pacemakerpressintl.com/uploads/assets/file/gaxasodelowave.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebd9f8ca5c---55097099876.pdfIn PDF document text
    • http://oryginalnedekoracje.pl/userfiles/file/97326829370.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/faromofar.pdfIn PDF document text
    • http://dpsnowodworze.pl/userfiles/file/68262591224.pdfIn PDF document text
    • http://abwsalisbury.com/uploads/files/43874676561.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/rogokofosizazifuwe.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/24071751676.pdfIn PDF document text
    • http://tuvantindat.com/uploads/2021-09-05/images/files/71080289426.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/digezitiragivuxun.pdfIn PDF document text
    • http://vaynhe.com/upload/files/votagumigigug.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/vutafiwejifuguxa.pdfIn PDF document text
    • http://drcleancenter.com/uploads/files/202109111131267406.pdfIn PDF document text
    • http://korytnica.net/data/files/36686939245.pdfIn PDF document text
    • http://2990592.ru/ckfinder/userfiles/files/maxuvekawebolagi.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD7 10796 bytes
SHA-256: 7d68e8c6bde0d1d8c98b3ae3aed0b63756633adec5e3f441859a346cfba44167
font_01_sfnt_off0000e3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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