Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b606d8c6b12d5a…

MALICIOUS

PDF

70.9 KB Created: 2021-09-16 15:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 34521d8ca6ff2d19fb54bcac4a492de5 SHA-1: 0cbcbfb2ee6de90600d82ce1a5aaedb3f3f8cf10 SHA-256: 12b606d8c6b12d5a6b7a76c4984e1a2c45b6f53b54a011595896ec8349d4981c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=good+adjectives+from+h PDF link annotation
    • https://hotelindigha.com/FCKeditor/file/711127313.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16137a58413559---vugivujigepuzijowuveza.pdfIn PDF document text
    • http://avesta-hmora.boj.se/uploads/userfiles/files/55928012527.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/zenarurejanejawamofakif.pdfIn PDF document text
    • http://xn--j1aai7d.xn--p1ai/userfiles/file/53807790412.pdfIn PDF document text
    • https://tomas-music.com/contents/files/73846842300.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/14725359763.pdfIn PDF document text
    • http://queenart.kr/userData/board/file/zutotegutizasuvala.pdfIn PDF document text
    • https://ngonluathan.vn/images/ckeditor/files/82630081154.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/48307112104.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16132fbdb85b26---bewajobirovalesumozatif.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/dinutiduzexerimo.pdfIn PDF document text
    • http://ottuk-e.org/userData/board/file/talusokujuwuwesoji.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/zodugixiwesitedij.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/62349558642.pdfIn PDF document text
    • http://www.hro.ait.ac.th/js/ckfinder/userfiles/files/69928216758.pdfIn PDF document text
    • http://folientastaturen.pl/_data/file/rogugamosorenilasudep.pdfIn PDF document text
    • http://pekbdt.com/filespath/files/20210916090807.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/file/tezupot.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210913021457.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_off0000b5ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5EF 15632 bytes
SHA-256: 41a3c4a73e9dbbb700a872a456023a9b271b7e42ec2ecf94224477b8648400f3
font_01_sfnt_off0000dd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7F 10824 bytes
SHA-256: 6327c282b8f31ac6de8919ba1a251521112823255eee37e5bc9a0dd7a434b43a
font_02_sfnt_off0000f681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF681 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.