Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed06f06fa754b954…

MALICIOUS

PDF

74.3 KB Created: 2021-09-04 20:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a7b4c06e099dab220b588221ad480234 SHA-1: 07a3534bb5e4e9fa8e1549fd8181c515f24b4bf1 SHA-256: ed06f06fa754b954f0bf1f5184a2896da9310a8bc7b721bc7c56c25d45307043
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed for phishing or malware distribution. ClamAV detection and ML classification strongly suggest malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c947f08060---5859804736.pdf In PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/49090819286.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021050322041673499.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/sokogab.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/desisimodalurirezoneri.pdfIn PDF document text
    • https://plasy.com/uploads/file/dozel.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/15911260719.pdfIn PDF document text
    • http://ccsup.co.th/uploads/ckfinder/files/17467767028.pdfIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/file/41715240337.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/42525370282.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/jsmrj1uf2rjidjke771bn6hav3/ratugelezasozixaweradon.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b882d7750b54edeefdc73ab588fa98b4/naritipifaxipawezunipipop.pdfIn PDF document text
    • http://immobilier-valence-agen.com/userfiles/file/tetuxolewod.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/18067760048.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080cd7c2ffd6---64042730372.pdfIn PDF document text
    • https://iltuosarto.com/file/85754360822.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/tebinul.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-8-31/20210831024340593442.pdfIn PDF document text
    • https://perfectprojects.ro/userfiles/file/wilaxafukoviromosim.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/bgvh8duh8a5huktsi5rug9tcrh/67278223538.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210721_214118.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/31121608491.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610ff16c4ce07---99057586892.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=general+knowledge+world+book+pdfPDF 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_off0000c0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0AE 16716 bytes
SHA-256: 741fc93cae5d3a4f1d28fe234d986842e982649cc77d51c2feaab9e404ca36a0
font_01_sfnt_off0000ebc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D7 10672 bytes
SHA-256: cf12c2f053f46e5e2824ebc542bc202da93a944cd355e06ad43c1bfc924e8135

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