Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec69d43409e0ede…

MALICIOUS

PDF

73.4 KB Created: 2021-09-12 17:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d7e3fec439f756c4b45b483199b030ca SHA-1: 07f3035d2599e53c9152d9803008d284d2bbfcff SHA-256: 9ec69d43409e0ede4b6279623c912bb3a837903dbddbfdfa2c2f3a7abf991de2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. The PDF contains numerous external URIs and links to various PDF files hosted on different domains, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the presence of multiple unknown URLs and the overall structure strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ptsound.com/plugins/ckfinder/userfiles/files/kugeditonudajadekunodezu.pdf In PDF document text
    • http://phuongsen.com/img-chamthi/files/xazedaxim.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/sibalatadipit.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161344dcee7662---73378725268.pdfIn PDF document text
    • http://kelkenaghshband.com/app/webroot/img/files/gajagerema.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/xebelafel.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/be0826212a62516a6c24f87efbf6f999/guriworixadutaz.pdfIn PDF document text
    • https://adium.ru/userfiles/file/266827274.pdfIn PDF document text
    • http://119pump.net/d/files/24559492447.pdfIn PDF document text
    • https://www.soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images/files/48176809867.pdfIn PDF document text
    • https://virker-ikke.dk/files/10341267400.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/xiziluve.pdfIn PDF document text
    • http://kirche-treuen.de/UserFiles/File/49109354744.pdfIn PDF document text
    • https://barcelona-health.com/files/galeria/files/52470085167.pdfIn PDF document text
    • http://princeverma.in/uploads/files/80340911381.pdfIn PDF document text
    • http://www.hausman.eu/images/wyswig_images/file/2460981571.pdfIn PDF document text
    • http://geo-equipe.it/userfiles/files/18690478337.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/25219276983.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/biziliwofatavewus.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/92016964334.pdfIn PDF document text
    • http://anais.terminarz.online/kosmetyczka/krakow/files/geripapopigogep.pdfIn PDF document text
    • https://sibiucuratenie.ro/fckeditor/userfiles/file/30223781287.pdfIn PDF document text
    • http://bjqyms.com/filespath/files/20210908092232.pdfIn PDF document text
    • https://wwa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/mezesanegunef.pdfIn PDF document text
    • https://ruh-center.ru/userfiles/file/vokaje.pdfIn PDF document text
    • https://www.tamilsaga.com/ckfinder/userfiles/files/selatunoronewub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=market+leader+intermediate+downloadPDF 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_off0000beec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEEC 10412 bytes
SHA-256: ca473a9c70499c5b9bfcf0490417cab17d8ffb342d1ba3a618c7e80f691fdc49
font_01_sfnt_off0000d680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD680 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE92 15932 bytes
SHA-256: 9d1d37fb0f92963dae5dabfa61cdd46a9165dc3c455387c7fb19d1c8ae55b728