Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae0620bd9ac85f0…

MALICIOUS

PDF

70.5 KB Created: 2021-09-11 20:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 65ff071fa54cf4742f5c74e81f3008ea SHA-1: 84fd27bcd3192800d249c70aee6d187dd4894aaf SHA-256: 6ae0620bd9ac85f0f295e5263c2361c706b5e78722a5a6a220ceb0aeadb6ce85
126 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 embedded URLs, many pointing to potentially malicious domains, suggesting it acts as a lure to phishing or malware download sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it is designed to redirect users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://anoh.net/pds/userfiles/files/12277936698.pdf In PDF document text
    • https://karpzbeldowa.pl/uploads/userfiles/files/lusetomeviwuxox.pdfIn PDF document text
    • https://ww150006.linebot.net/upfile/files/20210904235908.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/nojalaxokiwemamope.pdfIn PDF document text
    • http://harnettcountyhba.com/userfiles/file/43569869183.pdfIn PDF document text
    • http://hzxf.com/images/upload/File/87053136350.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210911152331_4k48ej.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe8947f364---kubumu.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/86132924540.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/bululoraribixide.pdfIn PDF document text
    • http://archiwum.wyryki.eu/admin/ckfinder/userfiles/files/33239139781.pdfIn PDF document text
    • http://sun-apartments.pl/data/pages/90248250614.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/91857344302.pdfIn PDF document text
    • http://xn--80aaaaadfwa5aftjhxrkcrg8iwc.xn--p1ai/pict/file/30985299661.pdfIn PDF document text
    • https://digireg.com/upload/dopivabibizuketutofimebir.pdfIn PDF document text
    • http://www.tm-africa.com/beta/public/uploads/cms_filescms_files/50495078638.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/21670056635.pdfIn PDF document text
    • https://bomando.bomsolar.com/uploadfiles/files/63193455485.pdfIn PDF document text
    • http://teranor.com/ckfinder/userfiles/files/xulijodesutomeduwupofax.pdfIn PDF document text
    • https://holcom-solar.com/webroot/img/files/lifomega.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/ribox.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/8384890517.pdfIn PDF document text
    • http://sireny.net/share/files/38307753454.pdfIn PDF document text
    • https://asoriofrio.org/ckfinder/userfiles/files/mususefoxegitixa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=bigger+leaner+stronger+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_off0000afe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE4 17456 bytes
SHA-256: 1ffebb7a6a5d6242d9c999b54699c5e67ce8111b221847592416438e27f63d31
font_01_sfnt_off0000dc70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF487 10560 bytes
SHA-256: 394a38bccc09596a40187c2431d86aa35effd459912db1b5edd0105cfcfb0666