Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e8bd293e86e27da…

MALICIOUS

PDF

79.5 KB Created: 2021-09-18 04:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6dbeb63477c8bf5cb210ebdd574b7378 SHA-1: d5cc40cb88fc946466948d0eb98cbe30b8e75d81 SHA-256: 2e8bd293e86e27da6f89181c5a3f9d89555e47d4246fb86fbf09cd2dfbfca7a6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains embedded JavaScript and numerous URLs, many of which point to compromised websites or disposable hosting, suggesting it functions as a link farm. The embedded JavaScript likely facilitates the redirection to these malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • 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 http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/putiteru.pdf In PDF document text
    • http://plusk-car.com/js/upload/files/75741617528.pdfIn PDF document text
    • http://highdeal.linkeo.net/ckfinder/userfiles/files/95748880434.pdfIn PDF document text
    • http://5percent-design-action.com/upload/users/files/83649691543.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143b6a316dc9---zizivadafowirejagoxisix.pdfIn PDF document text
    • http://mudrberanova.cz/userfiles/file/28131264878.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/dumukujiposuvifij.pdfIn PDF document text
    • https://viboot.traigiongthuha.com/ckfinder/userfiles/files/rijoxusuzunimawedirar.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/du31ugjq41ialtq3c2dnu2fimk/72024185933.pdfIn PDF document text
    • http://rewitex.pl/userfiles/file/fesirijelibifuzimige.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/fodutigeboletuvinowir.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/19188233869.pdfIn PDF document text
    • http://ebrinteractive.com/userfiles/file/vetabosibafazori.pdfIn PDF document text
    • http://houtackers.nl/userfiles/file/92806705071.pdfIn PDF document text
    • http://alarmy-kamery24.pl/userfiles/file/rujunagivemitadefoloz.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/setakuzalafipikezot.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/80336401732.pdfIn PDF document text
    • http://gaia-onlus.org/userfiles/file/lufemupoposixad.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/satekemebikuragunaf.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/f05678493329a37dc3762c0167093992/balufesulukixaxopadilo.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb177adea1---41995260859.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/163046639090.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=facebook+language+settings+androidPDF 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_off0000cfc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC1 18400 bytes
SHA-256: 33f11d7285315ce761085c6711c4bb4ee3fe46a7ffe1c07587329ef6627e02e1
font_01_sfnt_off0000ff10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11727 10856 bytes
SHA-256: 910401ecece938414973586cce73132ae6bc8681a296625c9d8cbf0eb9254318

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