Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f58d29b5b565a41…

MALICIOUS

PDF

50.3 KB Created: 2020-10-01 13:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: af9290da484ab2efd22df4053d4d9893 SHA-1: ef05d2090a44bbeb95d7eb5d51cdff1c1a9e60ea SHA-256: 8f58d29b5b565a413f067f46c9f0f99c1befc529d914cada5bdf404c9f4fab20
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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
  • 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.
  • 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://cctraff.ru/strik?keyword=digesto+juridico+misiones+pdf In PDF document text
    • http://kepusu.spcccmacon.com/uploads/1/3/0/9/130968988/fuxililinimux_tuzosiminidabi_fajefoju.pdfIn PDF document text
    • http://xoravake.brokenchainsbm.org/uploads/1/3/1/8/131872096/3383083.pdfIn PDF document text
    • http://jefudebam.verseskonyv.com/uploads/1/3/1/4/131453574/famugupapum-keraroxedesan.pdfIn PDF document text
    • http://files.murphyband.com/uploads/1/3/0/7/130775833/tunogovivud-dubeburajelote-sogipeba.pdfIn PDF document text
    • https://site-1036799.mozfiles.com/files/1036799/99134908838.pdfIn PDF document text
    • https://site-1037113.mozfiles.com/files/1037113/benufovuxoniwagex.pdfIn PDF document text
    • https://site-1037141.mozfiles.com/files/1037141/9268535927.pdfIn PDF document text
    • https://site-1037275.mozfiles.com/files/1037275/pamududuxufenalevuxonamik.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/73bb08b1-4afa-4953-b995-e1d3a9346eed/zabaxitogujot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adfdb530-db99-4e47-88ee-375850dbbf69/kujexivijigipogata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a697f6c-ac5b-4fe7-9bd0-44ddd3588f1a/9991353071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9781e890-99b9-48bd-a1cc-f4a4ee945af2/vozadirutuwolururaluju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f155f94-80d0-492a-8fe6-c92f209d428e/75885613149.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
    • 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_off000068b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B8 5308 bytes
SHA-256: 02a4d178f5cb142ddb6b8fe2ce70c9cc8b1a5e7deb754683b60a4439dddc8dfe
font_01_sfnt_off00007ac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC4 11264 bytes
SHA-256: 9768eb535da41ce0392d9adfa11a60265f99e871c60180172f7886ea34e763cd
font_02_sfnt_off00009f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F8F 17772 bytes
SHA-256: c22b07b6e9d0d0967ad069fa03b9a5331f178032d57018d758c50201aff7285f