Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e2ced4e2de81bb…

MALICIOUS

PDF

79.0 KB Created: 2021-07-16 08:43:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 13d58dea1f70e6b7e2af3062013d4ea2 SHA-1: 60b470157620e2f2d308677d5fc2aabdbc5100d0 SHA-256: d4e2ced4e2de81bb922499b95da7563fbfe1025a591cdc10d15e21051ab58f3c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS uploads or use disposable hosting. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded URLs suggest an attempt to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6111

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 https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/69l6muvf5s65le3pa9m7m0qcfr/49205496022.pdf In PDF document text
    • http://synowka.pl/galeria/file/sunurerenexar.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/jisurijumaturesederubet.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/83641045069.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160cef1dc694b4---jiramiwirevetaxeliwojute.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160765da43d80c---kasabagerusagurirem.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/9e35b3cbdf3f63622ac4648d3b226f58/betoriniromajuve.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f7147da36---7242777802.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/67941467827.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e6af4765293---95260262360.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b98f13a1dcd---xijowoxinug.pdfIn PDF document text
    • http://saovietgroup.com/upload/FCK/file/favurosedupoziwuvugitef.pdfIn PDF document text
    • http://smn1970.com/clients/d/d4/d44d2684521ac238e4bdef02d06179b0/File/guzuximitavimajowi.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16074339162546---votesudevuxexim.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/suxisukadotejidujifada.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.org/upload/files/67010095732.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a84316ce8fc---65370330746.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/nofiwisadu.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/50207749461.pdfIn PDF document text
    • https://egca.fr/userfiles/file/suxulidojeromuxiluzixi.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/64b90117c71fc825da4eca74b5014038/83934728765.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/4af408d1bbe278eafcc66f373d5ba747/rurefejewugetovubovuteman.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/wununikemitet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=ted+levine+silence+of+the+lambs+dancePDF 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_off0001040a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040A 17072 bytes
SHA-256: c3ee32c88e81e2ad94d42b7bcb40d332c841937718fe9a3db7ad9ecdc9a1c836

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