Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7a28113f857b0fd…

MALICIOUS

PDF

62.3 KB Created: 2021-09-07 17:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b5f46b354f8d825dd9a151a84ceaaa79 SHA-1: 02f14da33c5db334ffc27f81bc0f47b5785ff661 SHA-256: d7a28113f857b0fdc174324af0d2626022ee09383514f1a5560238cc4e64f4ae
154 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple external URLs, with several hosted on compromised or disposable domains. This behavior is indicative of a phishing or malware distribution scheme, aiming to lure users to malicious sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6567

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://mistral-paints.cz/userfiles/files/jowurilesuzenimiridetum.pdf
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/bb53171c425322c89d57ea5a765d6190/95387803197.pdf
    • http://ros.by/ckfinder/userfiles/files/lufadunuruxuwowi.pdf
    • https://www.stock2morrow.com/ckfinder/userfiles/files/65094929096.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/00f6bf8e731ae2096fabb388bc8111d0/92312178844.pdf
    • https://rosenstein.lu/userfiles/files/vasevazunobotozotekinezu.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160866aaab3c66---zebepipepoxunal.pdf
    • http://dges.in/userfiles/file/98864069809.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/733f8a1efc34e4cfb7171d6544eba074/48749849888.pdf
    • https://agrimal.pl/userfiles/file/23506779113.pdf
    • http://driver-jazda.pl/upload/file/18040429288.pdf
    • http://ipayon.com/root/FCKeditor/file/57343024822.pdf
    • https://alshaabcoop.com/userfiles/file/bisugimu.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/161002500397b0---2013896815.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8ffd9a3ad---sugowipiwodilasaruzoj.pdf
    • http://whatdwellswithin.com/file/7118091062.pdf
    • https://panificioilcavaliere.it/userfiles/files/83538114956.pdf
    • https://alrashed-alsaleh.com/userfiles/files/vefabaxalegamomegazorive.pdf
    • https://jaiminsales.com/ckfinder/userfiles/files/zikififilop.pdf
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/3k4qqhdvv10j0lk451m3ba14ns/55209842681.pdf
    • https://crownprolaw.cn/userfiles/Proj_Name/files/bobidiranekutapiwosazuri.pdf
    • http://macap.nl/app/webroot/files/userfiles/files/legamipajofufalozexudi.pdf
    • http://speckrepeg.by/UserFiles/files/zivitopujalatikak.pdf
    • http://tiendanatacion.com/noticias/files/zelivuzizonifu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=jeep+wrangler+2018+brochure+pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b508.bin
0196077999de9ea924cd014cf865e3ad2340de6cda557c56f788215e7d6aa597		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB508 15152 bytes
font_01_sfnt_off0000db62.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB62 16792 bytes

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