Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb1916fb2857702…

MALICIOUS

PDF

86.8 KB Created: 2021-08-19 21:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 3ad6760fd8cdb7d4c6e68664ddbfb413 SHA-1: 3fb702caa0876287d7acac82f677072872affff7 SHA-256: 2eb1916fb28577026df5fa1ef4546b6b7da151aab2c2614e746b6f3913990124
156 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress sites and other disposable hosting. These links likely serve as lures for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160761d0d5fa93---nupofatisedapa.pdf In PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/juruna.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/38160244804.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7c8d1f6a2---92443868789.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/sixaxoteduwapexulevude.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/29516613567.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f0ad8f23c---85986848664.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc3c6cd2df---wifepujiv.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/rapurumoseduritawi.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/42141586063.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/hb6q9iu225lla7nrbm4rk3h5k5/58553925013.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/a7r1kgavk6a9od02mgfd3k2ki5/jitup.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/161049a736c03e---zugim.pdfIn PDF document text
    • https://bataretak.com/img/files/file/43497279899.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/97755523651.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/81028141803.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16074939682ca2---89189506305.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d370c8a90b0---1636426049.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/zagewuw.pdfIn PDF document text
    • https://maintogelonline.info/contents//files/22719818153.pdfIn PDF document text
    • http://melhi68.com/clients/69549/File/11040683411.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/ia838d9r033d6m8bmv3k8p8069/51407853255.pdfIn PDF document text
    • http://progetec.org/userfiles/files/92358360787.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/kuwopajew.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16093fbb574e51---15900258982.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/98464303203.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/difujozopulojudekok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=ejercicios+complemento+directo+indirecto+y+circunstancialPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000e96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96D 18188 bytes
SHA-256: d09bf8a01443a7ed53e931919a3865169226555c97297887e8e0d22cd1fcdad4
font_01_sfnt_off000117e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E7 11000 bytes
SHA-256: 0c8d6a119941e277bfa7460d7389cc8a58f3a5d7d582f8c2275250041ecbae10
font_02_sfnt_off0001316d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1