Malicious PDF — malware analysis report

Static analysis result for SHA-256 f40f5b227873d401…

MALICIOUS

PDF

40.2 KB Created: 2020-10-09 15:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 8b688880d39ffd6ae1b408a400497b06 SHA-1: 7623f6ff5fc6137ea69c81327753dc2d7bbe73f5 SHA-256: f40f5b227873d401c9fe838c5f335f23a02d89e1ca24f5e924f29182885e5437
184 Risk Score

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.
  • 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=hp+loadrunner+tutorial+pdf In PDF document text
    • http://files.kittykdesigns.com/uploads/1/3/1/3/131398224/6708463.pdfIn PDF document text
    • http://files.pentasolutionsllc.com/uploads/1/3/1/8/131856131/ledon_xeletir_penozakideb.pdfIn PDF document text
    • http://polawu.alerc.org.uk/uploads/1/3/2/3/132303229/6dbcd.pdfIn PDF document text
    • http://files.twodaysnewstand.com/uploads/1/3/1/4/131483112/e873cb3455209.pdfIn PDF document text
    • http://luzibo.greensplendorlandscaping.com/uploads/1/3/0/9/130969744/1646711.pdfIn PDF document text
    • http://files.im84sports.com/uploads/1/3/0/7/130775729/duwipipusuzote_tisupi.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/5da4413f-b795-4680-b1ce-4f119a0385bc/biwaxunufixikukebufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27881820-8a51-4e51-b696-14c9a7c42b8b/82053558511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f69a5f95-d52c-4f9a-8604-4e524713ad61/mufugafavupidudumimevodaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3171cd65-ac88-4b80-8989-6e217a02f352/merapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e01f254-13e4-45fb-a61a-b07689b36642/82724976261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4623/1449/files/pathfinder_martial_focus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3785/2316/files/39123373573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/62021373596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2555/8436/files/bawewep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1786/5886/files/black_cat_bone_laika.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 1

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8B 4820 bytes
SHA-256: 9b8d55b7ea306ad0f41b2dbdcba1798d3ea770c374a1fa6ee5e2f03d38d4e8d1
font_01_sfnt_off00006ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFB 10532 bytes
SHA-256: 13168d887aed435f3439252f79bccbd8326f90dd7b4c23798ef8d3c1ddddcaf6

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