Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e64dca8d1f24f60…

MALICIOUS

PDF

78.1 KB Created: 2021-08-23 11:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 633feb21113fa6cc969a11bcb678c507 SHA-1: 3194043b4692f868b99dde570276d30d97a4e654 SHA-256: 7e64dca8d1f24f603634f9a338a6d044cf410c1572fa4c12e81eb2decd92f0b2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6036

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c1cf2322d---zedizarugem.pdf In PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/28352617751.pdfIn PDF document text
    • http://1careglobal.com/upload/files/beziz.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/91948935511.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/34892413406.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/57309022781.pdfIn PDF document text
    • http://zzweien.com/d/files/wuwuxuravezab.pdfIn PDF document text
    • https://wittnebel.dk/file/kowur.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/903d5694f7c90defdd989c9afe3e4080/forofimonezapad.pdfIn PDF document text
    • http://angelofthewinds.org/ckfinder/userfiles/files/22935621286.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/d6a32ecaa898a02d6602d543a5e672cb/81621164783.pdfIn PDF document text
    • http://suaups.net/userfiles/file/31186057558.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/wadarikeriwajakarovelowal.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/bi5sm0rekncuvdal3mpnlnnad5/82018522877.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/lawibuk.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/19018040088.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/e9d2099414aeaab7d2ab9c2cac46c69d/51117059989.pdfIn PDF document text
    • http://www2.grupoksl.com.br/js/ckfinder/userfiles/files/zopiwanuxikaralipuleze.pdfIn PDF document text
    • https://parkettworld.com/upload/files/zoparejonut.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc2c596eb7---68048726745.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e5764eec2---99456212158.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f31733eb3---rofewaferodigitojog.pdfIn PDF document text
    • https://hijaulumut.com/contents//files/vasox.pdfIn PDF document text
    • http://surtek.biz/image/files/20150120_072802.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/67740a922d5435ba1172ad22db448117/pogazozojojegezuwubanagu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=mayvin+palm+oil+millPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A6 17060 bytes
SHA-256: 775505563d363d786317899b8e2d15f4eb1115c6a7510a07ff7246246aef270e
font_01_sfnt_off00010e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001267b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1267B 10088 bytes
SHA-256: bf8a50080240b5c122b7f89111e438c04ea709c30b39ea95d3b9870ebf41e6e6