Malicious PDF — malware analysis report

Static analysis result for SHA-256 7817eaa7d6ca14f1…

MALICIOUS

PDF

107.9 KB Created: 2021-07-05 01:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3ad675a2cbb8da4fa7893d857ef66d6c SHA-1: cc6c5b7bb2069d392bababb971f9d5b1989092c4 SHA-256: 7817eaa7d6ca14f16a847d8996565d9686d962567618037987aa4a76b92b9707
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to compromised WordPress sites, masquerading as file uploads or reports, likely to phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://krisoc.ru/uplcv?utm_term=daily+production+report+pdf PDF link annotation
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/b6e24f425f4d0f3b566c02849bcd0531/muxakabuked.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce3ca28331---notalenisizozapi.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e22bec9a138---2228077192.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/12340810995.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/llu84i0pidvvc2upkjat96fca5/49023514715.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/erfufceegmu27q82kti4v9g356/zotusijaru.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608304101c8fd---katutufiw.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/mamixamapowobo.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/ae1107056ae01cccdbcc80d59bdae8bf/52136643579.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/885add5af7df5969069fff6e504bc7d5/44739003874.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/c4508da3c5fd53717579907cfb8eb910/maxofenupamudimezit.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/jugawefezirawosujojiv.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/norusovafosevuzafurok.pdfIn PDF document text
    • http://pcccphucvinh.com/upload/files/40151771197.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/c5cd1d39e7fe092861b8521dee500b73/48335931611.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b91382572a6---roxukaj.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/pidulopa.pdfIn PDF document text
    • http://jar-ted.pl/file/jaredupax.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/10b6b8e138a9541b7c49cecaeda58c2e/8643607097.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/limalejonokajiliw.pdfIn PDF document text
    • http://ok-poland.com/userfiles/file/jigud.pdfIn PDF document text
    • http://nandeestationery.com/userfiles/files/33616787014.pdfIn PDF document text
    • https://colegiumaniucarei.ro/ckfinder/userfiles/files/nafajumiluranobarifanix.pdfIn PDF document text
    • http://shssailors1969.com/clients/3/36/366f78b21138e0f8005dfe6cc5e09e30/File/26937286370.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_off00014711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14711 10660 bytes
SHA-256: 23e006bf496d5a59ab0d3204b55a8bf87ffdf35febdb1e48215037e3b6694d17
font_01_sfnt_off00015f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000177ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177AE 16504 bytes
SHA-256: 94c326efcb0fc4f9bc8dc3238d2265cf49e1304cf05e6f359e9ca920ae374fb7

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