Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5293ea032a4dd54…

MALICIOUS

PDF

69.1 KB Created: 2021-09-28 01:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7408e53c88a726030b56dc3ee37db8c1 SHA-1: a864be19d87770031842e9d977ef1ccae1512039 SHA-256: d5293ea032a4dd5483dbbf5f77e2b69ca2f8bfe2022d43a917af89c829da8b07
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high number of embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://archism.ru/uplcv?utm_term=venom+2+full+movie+in+tamil PDF link annotation
    • https://1877painters.com/FCKeditor/file/pupeduxemonuduwogasale.pdfIn PDF document text
    • http://sictombbi.fr/ckfinder/userfiles/files/darewumipubetuzofat.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/danuwomuju.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/sizorifirifarivego.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/75978989125.pdfIn PDF document text
    • https://sieuthimayphat.com/ckfinder/userfiles/files/66047072127.pdfIn PDF document text
    • https://kralpin.com/calisma2/files/uploads/wibidajuz.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613021d11e2cb---97706735989.pdfIn PDF document text
    • https://ubranni.com/uploader/files/16127063374.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/wogipofudadixo.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/4512272986.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210901192418.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/moruligufanax.pdfIn PDF document text
    • http://sooclose.eu/upload/File/76885285067.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/kidimojukezivize.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/wurujipubaj.pdfIn PDF document text
    • http://retailjewellerindiaawards.com/userfiles/file/24826694150.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/22648020459.pdfIn PDF document text
    • http://goghepcacloai.com/media/ftp/file/fogekamurodono.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/xudulawuleraniv.pdfIn PDF document text
    • https://jin-hung.com/userfiles/file/budoz.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/25975761020.pdfIn PDF document text
    • https://mimpishio1bet.net/contents/files/23760579755.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/tegebosigiv.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16134d16a531e7---88223126043.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_off0000b2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D0 10360 bytes
SHA-256: e14417bf6d50f5fa767d5cf8c472122c0cef1ca3764f8966e41cf8af9dabfc85
font_01_sfnt_off0000ca4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25C 14468 bytes
SHA-256: 5cf0ac8685d383687c68195709ef6b508570f73988253d3f22d9d70f53160e5f