Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e290c4c1149685b…

MALICIOUS

PDF

76.7 KB Created: 2021-09-22 12:14:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 35f555bdb1c1f9cf011b2ab7ad7cbb49 SHA-1: d1b132022a8fd48c3fc22c67a477f393a46991db SHA-256: 2e290c4c1149685ba18db063fca041f71b82d05fcca5e2f2f83fc82e647d8611
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, many of which are structured as link farms. The presence of these links suggests an attempt to direct users to malicious content, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure and numerous external links indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://laborke.ru/uplcv?utm_term=openvpn+cracked+apk PDF link annotation
    • https://planningpvedh.nl/ckfinder/userfiles/files/17130728372.pdfIn PDF document text
    • https://plewmal-d.com/Uploads/files/varumotarefako.pdfIn PDF document text
    • https://eurouniversal.eu/ckfinder/userfiles/files/bexoxatuxemusezilurofes.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/jitolejomonoxigom.pdfPDF link annotation
    • http://ferien-in-zahren.de/images/file/28805252513.pdfIn PDF document text
    • http://kedehg.com/ckfinder/userfiles/files/vakabupupezaparezi.pdfIn PDF document text
    • http://theexplorerthai.com/userfiles/files/jalomutimoveli.pdfIn PDF document text
    • http://lexuspolymers.com/assets/ckfinder/userfiles/files/xedebazun.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/91690924140.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/71660926478.pdfIn PDF document text
    • http://omnoiptv.com/outscapes/admin/ckeditor/uploads/ck/files/revijubujijadikari.pdfIn PDF document text
    • https://38e5bbdfe8be.gdziezjesc.info/userfiles/file/11056306342.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/65397565735.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/30075516101.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/ada9e803405b4aa31a327b636a512f9a/xubulakidulo.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/72351712636.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210914_150322.pdfIn PDF document text
    • http://mamitobe.ru/files/file/83926637571.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140edd2d831e---zazolonufituwagipatavugal.pdfIn PDF document text
    • http://ohadalegistrocbarter.com/ckeditor/uploads/files/xonofibizazunagurajap.pdfIn PDF document text
    • http://flexinform.com/hirlevel/file/83280911390.pdfIn PDF document text
    • https://tidurmalam.com/contents/files/muropifusas.pdfIn PDF document text
    • http://sanzmendia.com/userfiles/files/50194521175.pdfIn PDF document text
    • https://lazdynumokykla.lt/userfiles/file/69857688454.pdfIn PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/gejowowutubuzisozad.pdfIn PDF document text
    • http://skncn.com/u/files/vitulidabim.pdfIn PDF document text
    • 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_off0000c67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC67E 10168 bytes
SHA-256: 064824ff1ef5fc956daf1254447855640d06ccb6989f90eebc60626c77e85f32
font_01_sfnt_off0000dd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD69 18284 bytes
SHA-256: ecd86a2d597f6cab50e4af9b47b90660819a92a60cffb0bce595c60c6831759b
font_02_sfnt_off00010d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1