Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b2b6a643c9dd43…

MALICIOUS

PDF

79.6 KB Created: 2021-09-01 06:51:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cac451503b0a1e6005d1714a91fd6272 SHA-1: 49fb217f085e013bd6b50089d608364e0bbb64b0 SHA-256: 11b2b6a643c9dd43dc654d1f278631419b052db7afd96c302244c7e41fbbd785
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a phishing or malicious redirection scheme. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were extracted, the structure and URL patterns indicate a phishing attempt designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5794

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://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/eb26da20ece2c345658904bc4eac1ce0/jolilun.pdf In PDF document text
    • http://valdhans.cz/userfiles/file/zokafulanejemanugovemob.pdfIn PDF document text
    • http://forumcutuca.com/ckfinder/userfiles/files/jolus.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/96134811491.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6136c1d29e---15881393477.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16086ebd07bddc---30893043378.pdfIn PDF document text
    • http://sun-green.eu/ckfinder/userfiles/files/lalovixizajixanosuni.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/vigukazebigakeba.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/goxebudutogusa.pdfIn PDF document text
    • http://www.eau-msu.ru/ckfinder/userfiles/files/23330482258.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6bef4e90b---89002043401.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/58866617850.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/q0kk0inu88u3hcceak9u7mgne1/lenazaxulorokixavus.pdfIn PDF document text
    • http://uktohabbarijamalta.com/files/file/katuveromufeteni.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/6ba0dc9350d05106794884ef5fd35d59/sisobiwuk.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/60637818117.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/f2e708a88b4ea541b99c10636d840c8b/dunafotejedemogogifaxawew.pdfIn PDF document text
    • http://mhspartan79.com/clients/9/97/97d0d0788ec4d6723ba7be3cd58769e3/File/kunasunoxetomug.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/95843500523.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/53739178665.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd916f1b34---xolokimipukowo.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/tipuzixiruvirujanukavug.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/70133944503.pdfIn PDF document text
    • https://parokisantolukas.org/Uploads/userfiles/files/60536657228.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/mipelijuxukaza.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/86130678471.pdfIn PDF document text
    • https://epgeptech.hu/ckfinder/userfiles/files/43415979668.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=the+king+crab+shack+saucePDF 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_off0000e4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEE 10540 bytes
SHA-256: 02bc5adfd5f2db3dd2a27db77f60731a3ef30dffc22dd1f7e294dde3861afc4a
font_02_sfnt_off000114df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DF 17980 bytes
SHA-256: 6f5066fa2a40f80a4f96b0d1bc65e88cf87e761f324671755f87cf4a86195720