Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca74e0d9b9f5b940…

MALICIOUS

PDF

79.8 KB Created: 2021-07-27 13:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 541b648e585c11ea4eedc36f52e87a11 SHA-1: 925aa2cdc8ef478d22b75b342a29d9f19ab25af5 SHA-256: ca74e0d9b9f5b940ff9665a10a65dbadc12f62a1479e55c8c15b099e67d98d96
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm that directs users to multiple distinct hosts, many of which are compromised CMS uploads or hosted on disposable domains. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure suggests an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6331

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/3ec7ba958b4d012b93a8fda252d23e33/ruvifurixowegidoxig.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/98426961960.pdf
    • http://komodovo.ru/upload_picture/22157206044.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbfc8eed8b2---lusozigimeva.pdf
    • https://kcss.hu/korosi/userfiles/file/vewepoweripin.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609d13878dff2---kazuximokifogofisid.pdf
    • https://cakenepal.com/userfiles/file/31721107025.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/8882d6f1334b1cb38ad22d75b1dc857b/gedabagugabug.pdf
    • http://wmehoa.org/clients/d/df/dff1b85474dadb967ea0c40f6d5e37f8/File/tesinotomasogan.pdf
    • https://schilderlesvakantie.nl/ckfinder/userfiles/files/5002438908.pdf
    • https://avigailpekelman.com/sites/default/files/file/baxedizuroladiravepuxomev.pdf
    • http://www.pattyn360.com/upload/forum/files/xeseruluwipozon.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160845fa9e1f65---jugezojonumuwamenusugudik.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/91eabb093a3ac445bb99bb7a31cb2523/depurivitesinej.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da543acf39---sotepakodoweluz.pdf
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/s7pk867erac19jbkr3qfpbu6g1/pozusubak.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079cf6226655---wopigit.pdf
    • https://xn--z4qq44i.tw/upload/actfiles/23147860620.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b2afd8870---74213306072.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c7ac71386db---13504936173.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/6rus1okm3ikf81d1d090vbihd7/18092202608.pdf
    • https://magyar-logyogyasz.hu/fileok/file/42992436385.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/m04989ihnce43luqbb4jcn9tt6/buxitizokisifuzis.pdf
    • http://uelzecht.lu/userfiles/files/wiwategevugixemabarawiw.pdf
    • http://biosafety.biz/ckfinder/userfiles/files/potosotisad.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+calibrate+paramed+blood+pressure+cuff
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108be.bin
aa589a3ed05d951599d06e093d935772f9e87e67a8352abccba89c2a1accad9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108BE 17388 bytes

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