Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a94ef2e223b15d…

MALICIOUS

PDF

39.9 KB Created: 2020-10-05 12:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 8d02fdb00c21aad6a2a27677c7d30d0f SHA-1: 7319e7668c0247d1d6dbf2fa5e69e7a9a3fb2011 SHA-256: 51a94ef2e223b15d6a6fd19d7676fe02445feed50d1c21516aa0b8f7ff1beecd
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=cookworks+signature+espresso+maker In PDF document text
    • http://vojifu.milanamia.com/uploads/1/3/1/4/131437089/bc3896bad0fdd.pdfIn PDF document text
    • http://files.morganmckeen.com/uploads/1/3/1/0/131070195/mukowu-radefekeb-ziwunipufa.pdfIn PDF document text
    • http://files.windsorchamberchorale.com/uploads/1/3/1/4/131413718/2584389.pdfIn PDF document text
    • http://tagarod.skatehawaii.org/uploads/1/3/2/3/132302953/pumezem.pdfIn PDF document text
    • https://site-1040595.mozfiles.com/files/1040595/vavomumakarakota.pdfIn PDF document text
    • https://site-1039607.mozfiles.com/files/1039607/72257676010.pdfIn PDF document text
    • https://site-1037029.mozfiles.com/files/1037029/85719674008.pdfIn PDF document text
    • https://site-1038514.mozfiles.com/files/1038514/34705043244.pdfIn PDF document text
    • https://site-1043286.mozfiles.com/files/1043286/defosuzekikiwuxuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/79bd5e69-10f2-4ce4-baa6-0754aed51303/27894207012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/365ced55-cca8-42ac-b942-d28ce146744f/77017038158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55472bd1-217d-4674-8d40-cf5199905fab/suxugiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32006dde-d09d-4455-9ee2-582020458be4/lomezok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9270/0062/files/functions_of_life_in_chlorella.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7725/0453/files/ratotewivogaraju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8778/1287/files/7076507635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/0576/5526/files/52728758395.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000512b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x512B 5168 bytes
SHA-256: 0c51c0b2e22d24f520c3392a81fdc0be58e4bb35d1dcd8c9f4dd481a2ae52787
font_01_sfnt_off000062c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C3 9872 bytes
SHA-256: d9740d87611fe83b3ba95c8eca26630026a2b6f5a0e0250bd8bbe4f554152e2a
font_02_sfnt_off00008497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8497 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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