Malicious PDF — malware analysis report

Static analysis result for SHA-256 8063f0d3a32597f4…

MALICIOUS

PDF

89.7 KB Created: 2021-07-02 10:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: fb9309332d18bd60463fccb54df135c5 SHA-1: da59761f66678bcd6498fc99fc76869ad3672a70 SHA-256: 8063f0d3a32597f42efe0540e95c148e6d4bed29b0082e3f336981dcce4799a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, with several pointing to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's used for phishing or distributing further malware, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://ketchas.ru/uplcv?utm_term=interesting+facts+about+indus+valley+civilization PDF link annotation
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/rewigipuxipojowasiwuruk.pdfIn PDF document text
    • http://ruresept.ru/files/file/beletulivepagekanajigun.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/kifizaw.pdfIn PDF document text
    • http://thedreaminitiative.org/Content/Admin/uploads/files/70398417679.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/2a400ab42e7f92cca8b09ba072e2a95b/1223398830.pdfIn PDF document text
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/tq1ulvaipplfflt5mluhc81rjj/19403868385.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/depiwilakekemovij.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/kre163d2k9gji6iluemg3llfph/56726508872.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/32848589128.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/0281588dd2d1895fd07ee7ddeb21d565/77190280071.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d409e5b20---15854296642.pdfIn PDF document text
    • http://washchienluoc.com/upload/file/gokenimememijasugozigezug.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/9893a23dd14e1d415d8393f26d2285ff/xexuladazapodikap.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec541df7f1---kapilapejodow.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b759ec874---jevutat.pdfIn PDF document text
    • https://standardpromotion.com/images/upload/userfiles/files/foribezaz.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/satelos.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/70201099697.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/lubotabixexorarowixaxizug.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/pirozerufaxodorupup.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609091f21d886---xidivobekidabo.pdfIn PDF document text
    • https://room12shio4.com/contents//files/15801318741.pdfIn PDF document text
    • http://e1pl2.nazwa.pl/busy/fotki/file/wavojadamadi.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_off0000fbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF3 11080 bytes
SHA-256: 53ac8e7cfe6c5df77e934e886e7e72619f3204270d1197b7d2c4f70328923941
font_01_sfnt_off000115cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDF 16716 bytes
SHA-256: bfe8f69d60b30d260d54c1023250cfe8a7ed8311a9af27f59a115963da261db1

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