Malicious PDF — malware analysis report

Static analysis result for SHA-256 334072acc22aa341…

MALICIOUS

PDF

72.6 KB Created: 2021-06-27 15:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 354b296b9466615fae7d5c6eea7c6a4d SHA-1: 50f36e23b1f0ffb03db73870d0e32471f0b9ee72 SHA-256: 334072acc22aa34198800056ae1471d455fe6afebfca906e13dcfdfdb92ce0b8
124 Risk Score

Malware Insights

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

The PDF file contains a link farm directing users to multiple external websites, many hosted on disposable domains or potentially compromised CMS uploads. ClamAV identified this as Pdf.Phishing.Trojan, indicating a malicious intent to lure users to malicious sites. The primary function appears to be redirecting users to potentially harmful content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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://sladkiy-ostrov.ru/userfiles/files/pumizesunikodegukinoga.pdf In PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ds2l0lcjr5202imo986oi0ecb1/fezorizamofefulo.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/reziwodegar.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f1ebf14d3---sojenifela.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b4fe803e95f---pibananoxovofup.pdfIn PDF document text
    • http://planetamama.ru/files/file/86485463461.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b8b7559e5---medunab.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6ea61c8b65---taresaguzewur.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f14b5a77da---43351707899.pdfIn PDF document text
    • https://www.visitrwanda.com/wp-content/plugins/super-forms/uploads/php/files/0ae7ce797d16a9cf038e509033e29963/4257741535.pdfIn PDF document text
    • http://www.cddfct.com/up_files/file/pikakam.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607212dde875a---8998765952.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b404bdcbac2---dabagolimorok.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/49009610952.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e000278f6---89557651616.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/38160391250.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/cf55cfb51a0e46cde4e90d72a9315b7e/bapefuzuzuzu.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f23d0ed57f---mugelo.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/bomimizewat.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/0f874a9180000582b1f8776f68932754/jomofigupi.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/njh1p27d7lg6vikj0lahg7r9g5/xadolerexonoleviseru.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/3203233136.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/68760665066.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=these+memories+will+stay+with+mePDF 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_off0000e8f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001010b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010B 10432 bytes
SHA-256: c94c79cdc5f74869ca120c761949b38b3099801a78da6b688c144a1c44695def