Malicious PDF — malware analysis report

Static analysis result for SHA-256 384bd2b73c007332…

MALICIOUS

PDF

81.1 KB Created: 2021-09-18 20:38:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 491601a588e7190391c6fbd5c593defc SHA-1: 058e6e3d34d0238daebba5cf74eee92b27795516 SHA-256: 384bd2b73c0073325f4e4abe68ad03f0f8724690e378c96e9b8eb2c5f4423a8b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many pointing to unknown domains, suggesting a phishing or credential harvesting campaign. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm designed for SEO manipulation or traffic redirection. No scripts were extracted, but the overall structure and heuristics point towards a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://sharjahcements.com/images/bulk_images/files/xazipuxoviwinenaduxilel.pdf In PDF document text
    • http://kleiberit.ru/files/file/bivosorigiputabirovix.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/pipuxadefitamiguveminuji.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/mejekutofeki.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/69941430752.pdfIn PDF document text
    • http://change4best.ru/upload/file/bomukewa.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/wexojolupi.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/kudawitenexukapuwanu.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/gorufolumotulolexowuke.pdfIn PDF document text
    • http://imaginove.eu/data/Files/64144750918.pdfIn PDF document text
    • http://www.hkrns.org.hk/ckfinder/userfiles/files/wewawoxovudimazatox.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/42794733737.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/rosanegejuxis.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/3fbd7e38391dff61fee2fa19a46552ef/60687923723.pdfIn PDF document text
    • https://maychieuvinh.vn/upload/files/64564690448.pdfIn PDF document text
    • http://arcstema.com/userfiles/files/70290954110.pdfIn PDF document text
    • http://fred-robin.com/ckfinder/userfiles/files/41741059408.pdfIn PDF document text
    • https://zoldlaptop.hu/ckfinder/userfiles/files/dimawiba.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614122e7081cc---63698611285.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/59799035233.pdfIn PDF document text
    • http://image.dlib.vn/libedu/news/bvu/20210917/file/kogozegafabut.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/molawikojatudifaxipib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=device+policy+app+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_off0000d898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD898 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AF 10408 bytes
SHA-256: d8a82078fbb63a93d21846cae14465a08bd0b57e1b2561a2a3aa992ab4b332c6
font_02_sfnt_off00010863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10863 17900 bytes
SHA-256: 6a872f9841f56696e5147ecf681b65a0fb3d23065b6d4e0fda7174affa89de9d

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