Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2467ff19bd5888…

MALICIOUS

PDF

86.6 KB Created: 2021-09-12 11:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3e0ce881356fe1f4fde6ee0801ce1640 SHA-1: 10cf53f0a50726357c86811fbecf8810bddb3282 SHA-256: 6e2467ff19bd5888d7916ebf25623ceb1999e789d9acfa9fabfef5739ba178d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on what appear to be compromised or disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://wakesup.org/userfiles/file/sutedusuvimuki.pdf In PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bedovipu.pdfIn PDF document text
    • http://top-rubber.com/admin/fckeditor/editor/filemanager/connectors/upload/file/63992992045.pdfIn PDF document text
    • http://residenceraffaellotorino.com/userfiles/files/86027857389.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/r5na70orbv39sspbojoto4t34a/sedixeguraxadabomiburim.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/47559717153.pdfIn PDF document text
    • http://quesnelfoundation.ca/userfiles/file/tuzujalavodozunogowitewer.pdfIn PDF document text
    • https://cultureresortpokhara.com/assets/userfiles/files/5389735102.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/wududox.pdfIn PDF document text
    • https://keralahappyjourney.com/ckfinder/userfiles/files/zasis.pdfIn PDF document text
    • http://www.neoneophytou.com/ckfinder/userfiles/files/benixatogimifa.pdfIn PDF document text
    • http://ladna.pl/user_images/file/29713593593.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/58756433852.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/25894907168.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/34368994110.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16137199957ae0---zowufajogugoz.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ec7a72b15---sizipoboraleg.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/relupofaxodiji.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/kixixubew.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/buxazemajepoporakameda.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/sogogabo.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/17219500242.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=open+puffin+browserPDF 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_off0000ec46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001045d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045D 10396 bytes
SHA-256: 09a5b55874e3de2676c85bd5f4a2bc57f3088435ec21bde99d5c1352ffeaac10
font_02_sfnt_off00011bdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDD 18768 bytes
SHA-256: fd0f269ba7506b03d81cc7da3e9bade7d27ce3deda9a24d9f78a85a518f9c50e