Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7f11fc4175e3038…

MALICIOUS

PDF

81.6 KB Created: 2021-09-02 07:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7a68b789ad6f4288edb622ca9ac8a534 SHA-1: d135b8e7931381461d39ca399db1238e04eb3f8d SHA-256: c7f11fc4175e30380b9ecd22b0f74d7d3b034c5c81e3a2af940c9b2b9f932db0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the link farm structure and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 http://museeducuir.org/upload/files/xokupufakajuw.pdf In PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/khcniscro7j40aoc78486omu1i/dugulozidel.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/161180f6e00640---pinebupidabuxazomu.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/644ffd8be3996227fb3c9c82a5bd0bf4/28938460526.pdfIn PDF document text
    • http://ofipapel.org//ckfinder/userfiles/files/zozaravev.pdfIn PDF document text
    • http://air-ned.com/uploads/files/72298809443.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/fanumuwewagesisixifun.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/i80tg3dlgmaspro9g00uuid7r1/69629247385.pdfIn PDF document text
    • http://d4sontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/55049260556.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/b64053ca40758ebcdb6d17184ee83fe6/35068797392.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/32572106557.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/90659604926.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609698e37aafe---12188467529.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/d55aa518d2b21288ee38121b5d44122a/46074759185.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/1e14c57fd8c6c5d9f2ba2690faf97e59/xavobugawe.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ccb5d6f62---67313561139.pdfIn PDF document text
    • http://hollywoodterrace.org/clients/863344/File/58359393107.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/woboxitogofubizemi.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/sakelixuzonet.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/aqrj1l1o92es13jdcek7a4ntul/19945358763.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/87749456890.pdfIn PDF document text
    • http://vansuloi.com/uploads/userfiles/file/61743295478.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/mowuxibedexotik.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608faab8c58f0---85805500359.pdfIn PDF document text
    • http://sbs-group.co/userfiles/files/42539367867.pdfIn PDF document text
    • http://m2m2design.com/userfiles/vimamimupugokijetilo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=groupme+phone+numberPDF link annotation
    • 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_off0000db67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF379 18144 bytes
SHA-256: d1248e332970fbd30cca11d47f366b09d0ddf6b1ec26f60ef3c362e4879cb0d2
font_02_sfnt_off00012198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12198 10232 bytes
SHA-256: 0e4005296be363ad9c84577c13dc512acbac8e7d8169a85b5dc5ec9ba1e1e3d7

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