Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2c7d99cd07699c…

MALICIOUS

PDF

77.9 KB Created: 2021-06-13 05:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 200f99602e7c98a49fb4a586e7bc8604 SHA-1: 35825e045c650158ceb17d6e48daa5bd20151685 SHA-256: fe2c7d99cd07699c72facb23d04e0c42c3815b63f409b784e296ee2109d4732a
96 Risk Score

Malware Insights

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

This PDF file was flagged by an ML classifier as malicious. It contains numerous embedded URLs that point to compromised WordPress sites, suggesting it's part of a link farm or SEO poisoning campaign. The document's structure and the nature of the URLs indicate a malicious intent to redirect users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://archism.ru/uplcv?utm_term=funny+short+stories+for+english+learners+pdf PDF link annotation
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c3e45aa77---padutavevuk.pdfIn PDF document text
    • https://maturana.cl/upload/file/41914206738.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6ba3bd947---22545720249.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/qjgelr7medomjk2pm6p3itsu6r/peguginurojajadovesim.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ft9hurprpom3f5n192dapku210/53104824759.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c90a838f1---17593158993.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/7fih7n6ee6kanoejm00o6cbp22/rogubiniloradetatoziruke.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbed6f37cc---88071369249.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16093a2317079d---balinemijasa.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/saxizikuw.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/260052497789.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-4-30/20210430105156594342.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/21430cc05601fc9458d912be196bdc25/37799676397.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/6e181b418b6827b61d48e589da20f51a/desejozaxubiruzapus.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF262 5360 bytes
SHA-256: b072a78f53708f38accdba236f13480ee92882a9396d614c52e2f27a4a680eb5
font_01_sfnt_off000104a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A4 10448 bytes
SHA-256: e6c46d83f1bd9382c9ccf9a946e20bb0b126c0309fbda0ad6b4cf932412a48b4

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