Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0f1401c8ee7f48…

MALICIOUS

PDF

96.5 KB Created: 2021-09-09 00:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: bb47e8f84f729b474554d47c2381a3de SHA-1: 4f12b65964ba682e2e0f53808e2ecbe7a15d9d5e SHA-256: 6e0f1401c8ee7f481d1dcee3f2ceb9717f72eeec790c9aab676f32bc1f1c3298
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://chcial.ru/uplcv?utm_term=powerdirector+full+mod+apk PDF link annotation
    • http://rjbmachinery.com/d/files/66217638000.pdfIn PDF document text
    • https://2ruoteexpo.it/ckfinder/userfiles/files/wanusop.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/43781260553.pdfIn PDF document text
    • https://manualismedicina.hu/fileok/file/75258500226.pdfIn PDF document text
    • https://www.jakketoes.be/ckfinder/userfiles/files/jemonojadiwexiguga.pdfIn PDF document text
    • http://dentistturkey.com/image/files/xoxutigore.pdfIn PDF document text
    • http://glassick.com/userfiles/file/28375240324.pdfIn PDF document text
    • http://gasasosong.com/upload/fckeditor/file/fawojapepelubuxiz.pdfIn PDF document text
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/6427552188.pdfIn PDF document text
    • http://vers-ma.de/userfiles/file/38891250675.pdfIn PDF document text
    • http://krr-nfe.com/suratnfe/UserFiles/File/81831044075.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/libekuvijida.pdfIn PDF document text
    • http://lawyergz.net/uploadfile/files/wamuviwenasogajofedo.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/29063088025.pdfIn PDF document text
    • http://safetruck.gr/images/file/metufuwijofazodakadar.pdfIn PDF document text
    • http://kangmeideyiliao.com/uploadfile/file///2021090521095583.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/45699597156.pdfIn PDF document text
    • https://www.jaegeraviation.com/ckfinder/userfiles/files/15924116186.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613925c392fae---busox.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/kipebabesixonema.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/femipogopu.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/161350498412db---nipegemofekaxuzalevoka.pdfIn PDF document text
    • http://tdsns.ru/userfiles/file/34630690559.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/10381435650.pdfIn PDF document text
    • http://gitimohammadilakhimpur.org/ckfinder/userfiles/files/47842440813.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF87 10788 bytes
SHA-256: 0e12b45b33b4287a686408dd94c6bc2dd0f108986ac08e4eb766f425bd2db0ab
font_01_sfnt_off0001087d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087D 23096 bytes
SHA-256: daecad48320516c190521d2311d89ee4d020dd9a8bb0f7201931b7cd0905c860
font_02_sfnt_off0001444d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1444D 16560 bytes
SHA-256: d709491884ec882e964e072b295114413de164f92017ec1c4399470f554aabd3
font_03_sfnt_off00015b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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