Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dcd2f82185d1ad4…

MALICIOUS

PDF

84.0 KB Created: 2021-09-10 16:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9d9a9dbaa03ef49208592adeb48282d3 SHA-1: 84ae844d265d6e5ab48602fefaaa1a6fa7b2ffb7 SHA-256: 7dcd2f82185d1ad435912f31721e9d5a341e849a6ae64a4446ec535058e971fc
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. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://www.salpasafarit.fi/tiedostot/files/61216842652.pdf In PDF document text
    • https://thuhuonglacquer.com/uploads/news_file/gefilufaxixazulisipeper.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133b569ec9d5---19913675070.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/4784535315.pdfIn PDF document text
    • https://il-gusto.com/images/file/fabixepejem.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/moguz.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/161379a9f48a3b---26227402862.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/81450419026.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613377e8732ca---88476755040.pdfIn PDF document text
    • https://minhkygroup.com/luutru/files/68773743843.pdfIn PDF document text
    • https://braveathlete.net/geektic/files/10671116348.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139346e26fc3---sitomulujizarogezobadinit.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/27018303051.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c6c37a13b---domegolirazorukupona.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16138e332296d3---42372668158.pdfIn PDF document text
    • http://cochemical.com/upload/files/80930427139.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/revodipaluxidigonoxil.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/folufadurodo.pdfIn PDF document text
    • http://bbhshipyard.com/userfiles/file/68269647144.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/deganu.pdfIn PDF document text
    • http://smingames.com/ckfinder/files/87827177376.pdfIn PDF document text
    • http://insei.eu/userfiles/files/rexalesixovuguletinuli.pdfIn PDF document text
    • http://rosritual.su/app/webroot/js/ckfinder/userfiles/files/jukete.pdfIn PDF document text
    • http://fluorescent-training.com/file/43171216029.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/71377062687.pdfIn PDF document text
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/didika.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=redmi+note+10+pro+call+recording+problemPDF 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_off0000e506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE506 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD18 16924 bytes
SHA-256: aecad7a9de8e6861ec38ac2e090f7ac1bafbb4bd2c3d06f1949b490a9e44f367
font_02_sfnt_off000128b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B7 11048 bytes
SHA-256: 2e9d9f9f2aaf5ee11b35db98b91b137bdc64f27f51d2e8e076aeba3a3db14f94

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