Malicious PDF — malware analysis report

Static analysis result for SHA-256 9708f9bffef91022…

MALICIOUS

PDF

74.2 KB Created: 2021-09-25 12:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4bed8829023234e154f5bda1995e2ee1 SHA-1: 997df3d8a8a173fba273a36698bf76a1422d927e SHA-256: 9708f9bffef91022f8223abadfa7f2bf43ebb159590f8f98bd5ca03fd010c502
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous links, many pointing to disposable hosting or compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • 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
  • 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://mahae.hu/files/files/6770446318.pdf In PDF document text
    • http://malir-naterac.info/UserFiles/File/sovesezojak.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138bbe711673---52630603686.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/2991d3316c27d241c07f4c7c2311fcf4/17880077501.pdfIn PDF document text
    • http://yavuzselimvakfi.org/resimler/site/files/rudafifubojamumunogaz.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/vufogalugijuk.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/debetinivuwuzuna.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/f1cjiv8fkh3j97cq53tan470j6/83625587350.pdfIn PDF document text
    • http://cnsgawefgl.netsociality.com/upload/files/razajumulaseli.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e8ecbe6359---konadepuxikokab.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/sedotixebaden.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/59608608426.pdfIn PDF document text
    • http://auswallendorf.de/userfiles/file/tudipivejisijotowuw.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/retazamaxugaxasugowuk.pdfIn PDF document text
    • http://benhvienlaptop.biz/userfiles/file/66028394232.pdfIn PDF document text
    • http://jcnjl.com/userfiles/files/vonexemapigoz.pdfIn PDF document text
    • https://apelhijau.com/contents/files/marovisoxoguxidumi.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/takazopunifozowovu.pdfIn PDF document text
    • https://maydangson.com/vietkiendo/upload/file/40678536085.pdfIn PDF document text
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/supawaseleguz.pdfIn PDF document text
    • http://ctcinsulator.com/uploads/file/palezazitagewekeva.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/95529749175.pdfIn PDF document text
    • https://websbag.com/uploads/files/poludimedomuro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=mi+box+s+4k+tips+and+tricksPDF 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_off0000b7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF3 10732 bytes
SHA-256: 5032f67794719df498ffc379ae628288b360e44b1cd688ff91187debfa29632b
font_02_sfnt_off0000e898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE898 19692 bytes
SHA-256: a3c94cddf2d34f73affe4c562e708cdd2f69452de262b4dd337a1777643b7a97

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