Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee164b1aca66fb17…

MALICIOUS

PDF

63.1 KB Created: 2021-10-01 08:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c7db3d538a2d548f0b0e39c00d24cf94 SHA-1: 7b5346f02055aac40670524a7e2867a0a7eefd85 SHA-256: ee164b1aca66fb17e393cc6d5a285839ee6b4c60a209abbbf94a2fe4be018fcc
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected by ClamAV as a phishing trojan. Static analysis revealed it contains a link farm pointing to multiple compromised WordPress sites, a common technique for distributing malicious content or phishing lures. The presence of these links suggests the document is intended to trick users into visiting potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4850

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://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1abd12cb9---wirikozewexe.pdf In PDF document text
    • http://shijijiaming.cn/filespath/files/20210915161151.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/zirinixizugipabidimi.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/17052103086.pdfIn PDF document text
    • https://solelane.com/ckfinder/userfiles/files/juwavisidejusi.pdfIn PDF document text
    • http://ms-krmelin.cz/app/webroot/files/files/raxuxafofilisezakilopok.pdfIn PDF document text
    • http://royalgroup.at/tmp/kerowegiruvubizep.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/noraxagepurujulamumit.pdfIn PDF document text
    • https://full-e.com/app/webroot/userfiles/files/20210924_105951.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/gopebozagubodeb.pdfIn PDF document text
    • http://www.520amis.com/upload/files/52158679906.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/eh0b8b81q6gaferjgodebr66f3/91242727219.pdfIn PDF document text
    • https://badrivishal.com/media/pikeje.pdfIn PDF document text
    • https://artedeeducar.com.br/ckfinder/userfiles/files/vubejaremomokoz.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/zezinutarumene.pdfIn PDF document text
    • https://osakaav.com/userfiles/files/riwugokozuj.pdfIn PDF document text
    • http://sportschoolindex.nl/images/uploads/88603080425.pdfIn PDF document text
    • http://speckrepej.com/upload/file/pakuvexelarozaf.pdfIn PDF document text
    • https://lidiyageorgieva.com/ckfinder/userfiles/files/73367245056.pdfIn PDF document text
    • http://studioarchoggianiepartners.it/userfiles/files/248046324.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613913cf3f9a2---xutun.pdfIn PDF document text
    • http://logtech.cz/foto/Image/file/fuserofilazujonafetip.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/vejabeti.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/69841877409.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613e528e6dfbd---42027378171.pdfIn PDF document text
    • http://zapatosperezcabrera.com/ckfinder/userfiles/files/32469451675.pdfIn PDF document text
    • http://xn--nellieskche-0hb.de/userfiles/file/75458510273.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=can+video+call+in+messenger+be+recordedPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB593 10852 bytes
SHA-256: daad7f6074825eee20ab40137e777fd0c34461373496076743f4773cbb0230d8
font_01_sfnt_off0000ce67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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