Malicious PDF — malware analysis report

Static analysis result for SHA-256 b138578980ae479e…

MALICIOUS

PDF

47.6 KB Created: 2020-10-08 02:34:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 55db5f162dc129a91a04ee9ea211dbf9 SHA-1: 5c0b2276e04a68b16ec7bcf2d1c9600f641a05e0 SHA-256: b138578980ae479eff0307bfd0f6d4a9edda4d73d4eea962e75c6f15db8942b3
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://ggtraff.ru/strik?keyword=difficult+spelling+words+for+grade+1 In PDF document text
    • http://wavoj.thedissertationdoula.com/uploads/1/3/1/1/131164293/suromiwu.pdfIn PDF document text
    • http://files.crystallinevelvet.com/uploads/1/3/0/7/130775292/7a3372f25511b11.pdfIn PDF document text
    • http://files.reinventing-reality.com/uploads/1/3/2/7/132712326/donekujitog.pdfIn PDF document text
    • http://files.oaespto.com/uploads/1/3/0/7/130774962/948b0418f.pdfIn PDF document text
    • https://site-1036814.mozfiles.com/files/1036814/91062303435.pdfIn PDF document text
    • https://site-1038553.mozfiles.com/files/1038553/volisuxefudi.pdfIn PDF document text
    • https://site-1037222.mozfiles.com/files/1037222/17834980780.pdfIn PDF document text
    • https://site-1039892.mozfiles.com/files/1039892/dosulaguxokazu.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/3df625a2-43cd-4c1b-a424-d1984ce53112/vosimal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21cd20b3-4bd0-4dca-a718-3381feed874c/16591143962.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe2b5e3c-70cb-4f12-ae59-0254cff9b0e1/povekaramogavoweduzaden.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2938e7d8-a75c-47cc-8ea1-8be2ee639d2c/45718456711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29cb56a9-74c3-4cbd-bb7e-a9d230b7def6/34424140034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/572e57aa-fef9-4258-b5a5-ea9f21df4af2/64138528218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da13d4ac-b59c-404c-acc2-30a968acf964/suzed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74846577-0819-4b8d-8ffd-5ab17776f679/baninunagemasopenefixar.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4E 5464 bytes
SHA-256: 529aec2382d9038fd2701530763a6d9f60ebf8291de342b0aa32cd5fd9b1904f
font_01_sfnt_off00008e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E17 10340 bytes
SHA-256: 86b486c87cb8be006e5876c63dff3b0830d915340d59f4522366117c54772e3e

Open this report in the interactive analyzer, or submit your own file for analysis.