Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fe846f436d5501…

MALICIOUS

PDF

76.6 KB Created: 2020-10-26 13:00:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: dbb1a414f3d48f7cf46e68cf601dbda2 SHA-1: 0781136944155b851595041d91951a0197f11866 SHA-256: 95fe846f436d55018676f857d834cea13f5af58a089108bc023cd05ffbb86855
194 Risk Score

Malware Insights

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

This PDF file contains a link that redirects to known malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, appears to contain keywords related to 'cissp exam prep questions answers explanations pdf', suggesting a lure to trick users into clicking the malicious link. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://ggtraff.ru/aws?keyword=cissp+exam+prep+questions+answers+explanations+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393193/normal_5f9214405f906.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f89f7c662560.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3840/6806/files/53362312593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7481/7693/files/alchemist_food_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/figagotugebusefiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9763/6512/files/farenagezimora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/938f6196-23d2-41a6-93d4-d9b22f32f5fa/13232438937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/920e364f-6bb0-49a7-b722-e99fcf8dacb3/24493175807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8697/7441/files/rulemafige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/atresia_de_coanas_en_recien_nacido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9971/6257/files/nizere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaa4d4db-e70b-4745-bdb7-9a98f5ac48b9/madedogojemobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5056af5c-052b-4ebd-bce3-3d0bd81dc1f9/mazoruwenokonidusujikipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96206d3e-8f3d-4b69-a9ab-cb4c44fa4360/venifukotuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceeaf23c-5098-4fa1-b24b-3b41156fe64f/xugisibejalepenoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e7ad552-5683-4472-91d6-072723d0a1c0/julafizumowenuwojojipof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90036cc3-d658-43d1-b63d-4f548ae80fd5/tuxufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ecdeb5c-9c46-40a5-a28b-45a0e6ac93a7/la_suite_de_fibonacci_explication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f185a40-b683-44fb-859b-8a6a092125c6/siwamukagixi.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7F 5380 bytes
SHA-256: 474a9b93ac189ad95e632f315e33b7b2a8622444a45447d4a08c7e0e5a256466
font_01_sfnt_off0000fdc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC7 11388 bytes
SHA-256: 4a34170a0437505b6713b204b46e6217d11166e587e356124e9ee5824966699b

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