Malicious PDF — malware analysis report

Static analysis result for SHA-256 3579c42e0a40fb5d…

MALICIOUS

PDF

98.5 KB Created: 2021-07-19 14:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6239ea5d97185a909c4eff15384869df SHA-1: 2eb216d7c12b28de6122a1248fee4e5df5313cdd SHA-256: 3579c42e0a40fb5db00f54f1f548bc99009b6819c9b5169e4f70ec6cada86c5d
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, indicating a phishing or redirection attempt. ClamAV detection and ML classification further support its malicious nature. No scripts were extracted, but the structure suggests it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6852

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://rzn-house.ru/upload/file/40628476839.pdf In PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c5b0716d8---77909385211.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/dd26d863d8dc6202010c2613bfa1192f/53393044845.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16092c9f8d1886---xevud.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad71a6b3ed7---kemeluzinurinuledibinaje.pdfIn PDF document text
    • http://agiteam.org/clients/b/b0/b0c4817036ef1cb73596cc935f3fa86d/File/jivawufevugapokos.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/75188787647.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c01a677b9af---puwagefudema.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/b950c3b1e1fe40b0a1d4802478405565/xubelufagidusonitavisim.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/9512801434.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ddb2116d8---ziwekafowamivor.pdfIn PDF document text
    • http://abwessex.com/uploads/files/zajul.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb3b9cd4ff---41279332585.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/repebetajoxanozivo.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/56e8535d6a27c7c453017caac33ba21c/45216305242.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/70722370482.pdfIn PDF document text
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/saxexaforesa.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/9dvm2dkc3arq17bldbavhncodh/66801851197.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/e070b63245eaa424c510dfebbfc9952a/xowezilon.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/79ca77472e7c07844202764d246df4c4/latajovax.pdfIn PDF document text
    • https://12shio2.com/contents//files/81978994709.pdfIn PDF document text
    • http://euro-ex.com/pafusiruwafutaxedezefa.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/80841470836.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/2cf5b05aab10fe641cffe32fa631ac44/12102655435.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=modern+calligraphy+generator+copy+and+pastePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001261e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261E 10900 bytes
SHA-256: 164fe9885ed279bc00f3a19f95b66deb49f4f909ee08f476c9cca2b4f71faeb8
font_01_sfnt_off00013f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F09 5092 bytes
SHA-256: 9ceb19c247cb4b4d08bfe3a7baf5d3a0e63029fe1d50b6e630e489cfbef266f4
font_02_sfnt_off0001521f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1521F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00016a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A30 20108 bytes
SHA-256: 0cd462f8d511eb70cfb0df9cf74609e35efdeebac5bc0cc5cb8556dee88cfe5d

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