Malicious PDF — malware analysis report

Static analysis result for SHA-256 87175cf97adae650…

MALICIOUS

PDF

84.6 KB Created: 2021-06-30 17:34:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1bbf0a2f1225482805d397c1471738de SHA-1: 50e2e42da3ef7a7e929a6c23bcc0b7984fe20b64 SHA-256: 87175cf97adae650d328d924b092c847ef89d33a3f8b3a80ced27562b2146fc8
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a phishing or malware distribution lure. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised CMS upload directories or disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of embedded JavaScript indicates potential for further malicious actions, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3778

Heuristics 6

  • 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.
  • 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 https://cructi.ru/uplcv?utm_term=minnesota+multiphasic+personality+inventory+test+online PDF link annotation
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f1ae863ac---58940062505.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839d0f1dd43---40843073270.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609196757feeb---99667577593.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/lrsrionh3enidsjc5sh37690e0/gukedabapokig.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e577a86ef---41919431271.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/44781764470.pdfIn PDF document text
    • https://jetaime-shop.com/files/gimusaxepokuvexe.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a35ae498a68---kupowuxemafosaxabixowevi.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f0e693bd3---fadonep.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/d3e6646493bd3259e561fc16e1cb08a5/karalo.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/xunudubebad.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/4a0dc0c8d1037db85e807cbc6354b03d/dajenovogipuvafujasaw.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c89dd36176---82267604895.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/82100098833.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/71853633767.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/bakugoxasamo.pdfIn PDF document text
    • http://boisehighclassof1965.com/clients/879780/File/xujinikafinoti.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc20f684026---98983372830.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/33132305049.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/eu4hblk4afq4qkupa70ldjp5oh/wodaguretex.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/9160367474.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/48123433997.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/3knrlhmufs6tnh8cpf8j2fe46c/tumobepawu.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfd9317044---jeluzumewumisamonuxoxu.pdfIn PDF document text
    • https://mediaget.com/userfiles/files/nuxusirowesuj.pdfIn PDF document text
    • 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_off0000fdda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDA 17244 bytes
SHA-256: 7fc06d448a5a7c010465e8763a7e1b14044612537046ca547121f71c5df84cc1
font_01_sfnt_off00012ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD9 10912 bytes
SHA-256: e7376290917f88e7ba62316706e7b1a3e67e2ea6e30fc968693c65c454183b91

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