Malicious PDF — malware analysis report

Static analysis result for SHA-256 9979b76846441eb8…

MALICIOUS

PDF

65.1 KB Created: 2021-10-07 09:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: eca3af11c896445d6bd2b02a2c28f7b8 SHA-1: d00fd4d563ee69e7c58d13f55b387717233cf012 SHA-256: 9979b76846441eb8c4ad289305ebf686ed251704ed33b8bc4b276cc531aa5a4f
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as a PDF phishing trojan by ClamAV. Heuristics indicate it functions as a link farm, directing users to multiple distinct domains, one of which is hosted on a domain that appears to be used for disposable content. The presence of numerous unknown URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4625

Heuristics 4

  • 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
  • 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://www.farmaciapenil.es/userfiles/files/55650744905.pdf In PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/nirepunitowuzu.pdfIn PDF document text
    • https://jagamimpi.com/contents/files/jevovek.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/linivomur.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/notugewapibe.pdfIn PDF document text
    • https://wmu24.ru/media/file/fosinifasetadidutotob.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/woxapesunorerik.pdfIn PDF document text
    • https://aneri12.cz/res/file/53206801616.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/22741576286.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/firugumunuwexijutaxevol.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16144ab10ce31d---77440575403.pdfIn PDF document text
    • http://szm.hu/userfiles/file/lovefudekolebaj.pdfIn PDF document text
    • https://isgz.me/userfiles/file/72954688394.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/kebonozejaguvanuro.pdfIn PDF document text
    • http://boldogelet.hu/media/bodurogi.pdfIn PDF document text
    • http://h04ydivan.ru/userfiles/file/bajawi.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615d15d2291f6---zotenewamajabon.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1614049f9110a9---fudizumolefe.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/pavotir.pdfIn PDF document text
    • http://zygzak.eu/foto_dane/wysiwyg/File/74575314513.pdfIn PDF document text
    • http://vicc.huh.hu/UserFiles/File/65369281879.pdfIn PDF document text
    • https://kaptenhoki.info/contents/files/94938939723.pdfIn PDF document text
    • http://bigbulkbags.ahmadpackages.com/survey/userfiles/files/revenujevujexodekeru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=both+input+and+outputPDF link annotation
    • 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_off0000bce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F7 10196 bytes
SHA-256: a4725c70174cb45e45ad5d26ece9eae177abc1a5c083e26241622f8192564834

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