Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f2d9b95a5e8c5ce…

MALICIOUS

PDF

70.7 KB Created: 2021-03-28 06:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 396409b1f5734a5ebd31d4be3c40ae26 SHA-1: 0fcd5adcc0f4d3104d44bed5880effacf2077181 SHA-256: 3f2d9b95a5e8c5ce487fedf324a5cd9ade92748f87f35588277ba571af9cc37b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9649

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://nipisod.ru/award?keyword=amendments+1+10+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388041/normal_6037653378b49.pdfIn PDF document text
    • http://idealica-ituficiale.website/addition_worksheets_for_grade_3_cbsedxaro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385216/normal_5fe2501ff188e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528260/normal_605691e74b703.pdfIn PDF document text
    • http://kigurumi.org/venepafipazeloyptcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388413/normal_603f4b83db2ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384650/normal_6030f9780a5e5.pdfIn PDF document text
    • http://pornbustyvids.com/fokabajokijsi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410199/normal_5fdb8ab397f9d.pdfIn PDF document text
    • http://repochka.site/46578998202gn3k6.pdfIn PDF document text
    • http://getallcreditscores.info/kujifisenogefoxixagizoba97.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1adf5815-51f2-41b7-8112-53179d1e3bc5/tizumiputiwuzulonix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29e63f91-a04b-4c8e-a64b-5eecfb4b47b3/how_to_use_moultrie_mobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/587005ba-5bef-4137-90c4-e3a2cdff851d/susavudebivepat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/972cb64e-016a-47b7-a72e-ef81c7b67b57/zoom_5352_bridge_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b292bb06-f052-43c9-baf2-9f9491f5cde4/83982832804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77afeaf1-0d8e-487c-92a9-b071d805536e/ramojazojunozezori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/847f470b-461c-47b2-8f01-cbc2f613db08/download_do_livro_memrias_pstumas_de_brs_cubas.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FA 5032 bytes
SHA-256: f2444a706e5025c0f3af6232754043fee9f79110acea0c2e359e77075b5f3639