Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb47c7ec4868941…

MALICIOUS

PDF

79.0 KB Created: 2021-08-03 02:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3f139a2ef326c1b4589c23973f1b87da SHA-1: 8da62a5fde08178f8c5f9aa1ead098f39a869236 SHA-256: 6eb47c7ec4868941ad51bc0a37ce8a7a80f1d01401cbb3ef0c87ad07fa2c5f3a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a link farm with numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to trick users into downloading further malicious content. The presence of multiple external URIs and a link farm structure strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6920

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://coretry.ru/uplcv?utm_term=modelos+y+teorias+de+enfermeria+7ma+edicion+pdf
    • http://www.hydro-tg.pro/upload/file/xazabopowijenefake.pdf
    • http://fine-cottage.ru/userfiles/files/83650499641.pdf
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/03d5f641045a64b5e1cf4386c7e06fc7/xulefibapakur.pdf
    • http://kibbkw.com/uploads/file/21988131582.pdf
    • http://thermcom.cz/userfiles/file/71143490408.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/d60d1bb22027f40e31ade85acc89fac8/vekisezi.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bb97884f65e---sipabi.pdf
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/tapukivojajopigilis.pdf
    • https://tahubunting1.com/contents//files/todametoraw.pdf
    • https://journeywithmypet.com/ckfinder/userfiles/files/kogawifafawobilagum.pdf
    • https://bravo-hk.com/userfiles/file/22360775794.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd3180e3c7---vomat.pdf
    • http://westernmaki.com/uploads/files/61851343401.pdf
    • https://zlato-eu.cz/upload/files/potowuropisibibinizevaxaf.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0ce6f27ec0---losuvokubabalojunaniz.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b5958b7cc8f---fimonopubelomi.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094af2549386---tudexizajoxegida.pdf
    • https://xn--mgbaf4adbs1bd2i.net/upload/ckfinder/files/vetinomeguwob.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/tujfs49v7a5fdi8sv5nej97deb2m91a3/60182239188.pdf
    • http://mesterek.net/tmp/fuwaxadepuxo.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/94f0fb2799781a165f837f4ca0e5f1ba/robem.pdf
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607875bc1775d---mutedapakemidokuwubej.pdf
    • 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_off00011212.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11212 16792 bytes

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