Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebda9ee36bb6f80b…

MALICIOUS

PDF

72.8 KB Created: 2021-09-29 12:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f529d3ddfc5bb6ec9fe247bd6a7a7f34 SHA-1: 0b1e7acae23966d6ba6ca6c990dfaef514369046 SHA-256: ebda9ee36bb6f80bca6bd2a585e546934838f4ab3add9db1f55b33810f80da44
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs, despite some being marked benign, point to a pattern of redirecting users to potentially harmful content. The file's structure and the presence of numerous links suggest an attempt to distribute phishing lures or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://patrick-jardinage.fr/ckfinder/userfiles/files/98933118259.pdf In PDF document text
    • https://coastalstudio.com/images/main/file/dafifikinonujugojozamuvub.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/ruzegadasuturawuwukuneg.pdfIn PDF document text
    • https://dom4m.by/userfiles/files/78117770479.pdfIn PDF document text
    • https://ladymamashop.com/uploads/files/202109260802531442.pdfIn PDF document text
    • http://jnmindia.com/outscapes/admin/ckeditor/uploads/ck/files/99472038587.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/kupope.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613255e42e079---nifizazusagitaxojorowoles.pdfIn PDF document text
    • https://computerzone.pk/file/92179769233.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/38465014275.pdfIn PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/2140016465.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/63657243163.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/161366499ca2f6---vifof.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/71472498120.pdfIn PDF document text
    • http://zatuchlina.cz/upload/file/1674693302.pdfIn PDF document text
    • http://apisicul.com/userfiles/files/nezimege.pdfIn PDF document text
    • http://mariekevanvlierden.nl/survey/userfiles/files/jozebeku.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/54034116527.pdfIn PDF document text
    • http://087334211.kad.tw/kads/ckfinder/userfiles/files/sefusidafiwewaxani.pdfIn PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/madimedarubixafafav.pdfIn PDF document text
    • https://olajpark.hu/files/files/leniboveraxos.pdfIn PDF document text
    • http://cmtl.in/uploads/userfiles/file/file/90272503103.pdfIn PDF document text
    • http://humanlitech.com/files/files/96020624186.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=scam+1992+watch+online+mx+playerPDF 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_off0000b6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ceba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEBA 16888 bytes
SHA-256: 8aa584bb119b5438475566965fc1c64cfb8e9189e771ff76cc45d467b4a455e9
font_02_sfnt_off0000f99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99C 11188 bytes
SHA-256: cba5a79af2855a6245a961608a8f7e6066b4686770be440b05643356bcf35d54