Malicious PDF — malware analysis report

Static analysis result for SHA-256 f45bc529829ad210…

MALICIOUS

PDF

50.2 KB Created: 2020-11-09 13:20:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 804e4fe38c2ca9e682949a466b507d3f SHA-1: c97c6bc936a907b5106d36dc131819e3cfc17e33 SHA-256: f45bc529829ad21061f1816f8a443954ea4e683a271aa7aa5dcf615028f3fc6f
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=his+theme+virtual+piano+keys PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369141/normal_5f89fab00c080.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445101/normal_5fa84955a09ae.pdfIn PDF document text
    • https://ketawajizaw.weebly.com/uploads/1/3/4/5/134528489/2979835.pdfIn PDF document text
    • https://xoxebugifujame.weebly.com/uploads/1/3/4/4/134478015/pomewosekavatukiw.pdfIn PDF document text
    • https://ropugobefele.weebly.com/uploads/1/3/4/4/134445072/7054711.pdfIn PDF document text
    • https://rimosuvifakub.weebly.com/uploads/1/3/4/3/134310068/kumub-lojisedosul.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/06926.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/sumavi.pdfIn PDF document text
    • https://nibojesuko.weebly.com/uploads/1/3/4/3/134329062/rinubopasumoleviz.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/1302795.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/nofaganunexur.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/0fadf44e-ffb7-4923-a6f2-4e979665bad6/91953743435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6706806f-4dcd-4c17-b56d-a176f2b2faa9/7726344272.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8bf4904-b0de-402a-a6e0-23bfdd62a03a/ligobavesigifilobufezo.pdfIn PDF document text
    • http://virtualpiano.net/TheseIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A48 3016 bytes
SHA-256: 07efd4b5ce35fe43d562a47bea6ca2be7e52a32f6dbf0d49a2a72276c44a66d1
font_01_sfnt_off00007503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7503 5128 bytes
SHA-256: 1bb157178335debe449a1c9d0161c6158b0f580dd90345918083f0f68deedcdd
font_02_sfnt_off00008647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8647 11860 bytes
SHA-256: 1121704392fe40157da9960188a610f59dab6284a79680168736b1b260654766
font_03_sfnt_off0000ad53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD53 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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