Malicious PDF — malware analysis report

Static analysis result for SHA-256 962dded58bdacbe0…

MALICIOUS

PDF

72.9 KB Created: 2021-09-05 21:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 941668d6b5f44944368602c0c632060b SHA-1: 46a9215f642f0c7dfbfca7730dd259b0699371ab SHA-256: 962dded58bdacbe0d2b625694149cd04314d79705bc68e2c968a671afc3bf31a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing operation. The presence of these links and the heuristic firings related to link farms strongly indicate an attempt to redirect users to malicious or compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f4ab85ca29d---pufoko.pdf In PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608408c5cf590---6964948005.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/sipimaximalikogupez.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/9346859762892aa9c4d9c89b8586e868/zumaxorazop.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/raxesef.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/ludigo.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/93291247196.pdfIn PDF document text
    • https://texasbordervolunteers.org/userfiles/file/tinulotanebovujuwemoko.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/12622054690.pdfIn PDF document text
    • https://butyfarm.mm520.net/userfiles/files/14099469401.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607796ad24c0a---88699239220.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/ded7f488813606e177d0370a151f3d30/kozoko.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/jelosufitebuderelokag.pdfIn PDF document text
    • http://voorwindenotariaat.nl/app/webroot/files/ckeditor_files/files/xufovivulip.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1c3ab5e2f---zewaligatos.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/38759950326.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/174086709060ce0f3211193.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/4f8a681ef72e08799a504db9b8bb02a3/jutenusakujovufedixuzi.pdfIn PDF document text
    • http://bouwbedrijfbouwheer.nl/userfiles/file/59090620159.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c23efd86c31---12662037892.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/58259204008.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/ntlobi0tv1mcjnauho4ve9h1e5/lakelarob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=protocols+for+neural+cell+culture+pdfPDF 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_off0000ba05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA05 10624 bytes
SHA-256: 14d0c2922f5cce40f915a47381262cc670ab7c68196ac15a94ffc3fbbf2286ac
font_01_sfnt_off0000d274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD274 16948 bytes
SHA-256: e96bfe904c8d02ff807120b41d96cb8e18e290530ab89c7c857a53ba558bdc51
font_02_sfnt_off0000fe11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.