Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcfccbe8776ea6d8…

MALICIOUS

PDF

90.1 KB Created: 2021-06-06 08:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7362f97943d695cdc2ef69c51b8e898d SHA-1: 2a264002594b28e227256d2e41dffd5871a6df17 SHA-256: dcfccbe8776ea6d8a3340169f8e66fcecc1d3970ae66c25a03ae7f8b717fbc5d
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to downloading specific books.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://synerhu.ru/uplcv?utm_term=sherlock+holmes+books+pdf+download+in+sinhala PDF link annotation
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea93e1016f---sezefegekakupe.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/9d40be2b970169bd41b2c5550b9c0b84/55877094097.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/7ffa389ef0b223e63fe5cc6ca7fc22d4/34906783994.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982b5194a40---98192058507.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/1i38uqtvt3f05s5ndfrhbljbcp/sodulitamolom.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/musuxux.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/xotekafasakemek.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160ba56776175d---74208420868.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/86172583487.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/30da3535ef471996463da8ba02bcd6ce/61442691847.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/5fb9dff1de0e556417fb943137052e92/1179687011.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/c72497875c345fbe7ac24d00c2018b6c/40641221317.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/d0fa80ade79af835c58749565b48e06d/puragewopabuv.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b86e5fe8c---niduwazenutoletojoj.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efff7964d2---36715407135.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/94947d3fa1558a45687028d1c40428b5/falopepas.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/74110336603.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c76a754288---15429723631.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/sb6rhho7tu9kf24dj7v9sbtskf/xukuwaki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn 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_off0000dd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5F 5792 bytes
SHA-256: 4ee878d3bdc1def3655a0b5ade676dd67be638fe4a9acb2e53bff2780da27dbe
font_01_sfnt_off0000f0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BB 16948 bytes
SHA-256: d799b1524a9e27671f02db50efd43d565e95bbaaffd0d0c175a06b4422ed3ac2
font_02_sfnt_off00011c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C91 10984 bytes
SHA-256: 3c47bdff2523682b190864421d5f9b60709a0475e5dfc111f0ad7609da2cc9cb
font_03_sfnt_off000141b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141B3 16448 bytes
SHA-256: bbc8a377ea308525ea4a093a1cfbcbef18081e68dbc1dc7ef94177a4c93541e5

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