Malicious PDF — malware analysis report

Static analysis result for SHA-256 c08e1d1366877d92…

MALICIOUS

PDF

77.3 KB Created: 2021-09-13 09:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9662cfa7b031c3f261d1abebd1720817 SHA-1: 19c5a9c9021ba5bec465e76d7f0babf36cdc4669 SHA-256: c08e1d1366877d92e260d4db5b0e1eb226da5867c1eb5dd0eab4b22228a2f54c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded links, many pointing to potentially disposable domains, and a heuristic identified a visual download button lure. These elements suggest the document is designed to trick users into downloading further malware or engaging in a phishing scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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
  • 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://ucinnovation.ru/admin/ckfinder/userfiles/files/27089217606.pdf In PDF document text
    • http://praxis-greve-polley.de/web/editor/files/6523569992.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/79490144810.pdfIn PDF document text
    • https://gres-k.cat/userfiles/file/71518463004.pdfIn PDF document text
    • https://rugsdirect4u.com/uploadedfiles/file/60608262798.pdfIn PDF document text
    • https://innovativallatgyogyszer.hu/fileok/file/gopoxoresenupugopatiki.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/nopowabakitezoresew.pdfIn PDF document text
    • http://easytravel63.ru/ckfinder/userfiles/files/62665553058.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/pewadirowivitesoj.pdfIn PDF document text
    • https://piti.leaddeehub.com/userfiles/files/kiwefusuduwu.pdfIn PDF document text
    • http://chernogolovka.inhome360.ru/admin/ckfinder/userfiles/files/firovubesikawivikaxel.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/64194448204.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/vejuwexuvejidag.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/59909577330.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/92b689a1cf7aaf8c7402097456f8abf7/bomutokafobodijile.pdfIn PDF document text
    • http://arhive.np-sp.ru/img/file/kubixidow.pdfIn PDF document text
    • http://robbes.nl/media/files/wupububugabekevenobapivu.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/jirobulokogekoj.pdfIn PDF document text
    • http://jaluzipro.ru/public/userfiles/file/35331438479.pdfIn PDF document text
    • https://lose-weight.tw/upload/files/39937203368.pdfIn PDF document text
    • https://copperscraphandlers.com/ckfinder/userfiles/files/92741628967.pdfIn PDF document text
    • https://congtydaihai.com/upload/files/61301262777.pdfIn PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/91026327044.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/95512401979.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/36423164277.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=majnu+telugu+full+movie+hd+1080p+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_off0000c6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B2 17628 bytes
SHA-256: e98e3d46e4fa718208c23a08fb60ba01fa39d39e5e8787f501ee728d12392434
font_01_sfnt_off0000f472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF472 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C89 11432 bytes
SHA-256: 83bdee873ed9aceea6b98d928620802a3a3e8361c46dbd4424f7def32d318e80