Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82006c32dc31c05…

MALICIOUS

PDF

64.0 KB Created: 2021-09-08 06:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7d3aa281f62db3093a64756a81104f31 SHA-1: 867b8a1091a07aecfd03addeed8535d03c8ede1b SHA-256: c82006c32dc31c056723ad6cc4c0659ec69964a8226e7ae7eade5d309a85f007
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9203

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d81937c5b---10075184860.pdf In PDF document text
    • http://cestovni-postylka.eu/userfiles/file/7801603417.pdfIn PDF document text
    • http://belean.pl/userfiles/file/wagikunisepa.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16081ff57349e6---3503260992.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/gojukavenapugep.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/59830581278.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/sokuwilomavizeregotifujov.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c95b7d1951e051407ab71d67b89e5ab8/26636028656.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/50064701313.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/21699430481.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210619_2C400B4F0399DB7C.pdfIn PDF document text
    • http://fitviewer.com/files/file/pubefolisesipal.pdfIn PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/65086964208.pdfIn PDF document text
    • http://thenext.pk/userfiles/files/39524029791.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/32355978659.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7eef4a26e---53502564952.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/azuragesasiwi.pdfIn PDF document text
    • http://maihome.hu/admin1/file/bopikixusu.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1cbdb12551---kikikapabefolitirexipu.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f1660c9465a---zuniropotutanojekila.pdfIn PDF document text
    • https://quaint-house.com/lusalenibogaz.pdfIn PDF document text
    • https://dodatnojamstvo.com/userfiles/file/71096097797.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2b1278499---dofurenaf.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/mikizadetejawiz.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2650d1caf---34369833463.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=suspension+letter+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA64 10504 bytes
SHA-256: 92a5921065e467235d2a577572af9365af3672b8ebc8b93e35572b4b87c4fc35

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