Malicious PDF — malware analysis report

Static analysis result for SHA-256 21a7c2473c1fcbe9…

MALICIOUS

PDF

49.9 KB Created: 2020-11-08 14:04:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: fb41e10447ea16585310ff45b7a7462d SHA-1: fbd2bce240fa223f8479f2af8e44bf7b2d1c6d87 SHA-256: 21a7c2473c1fcbe963af87b25801bcce0053ea4eb165afa717e54b696d446768
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://traffset.ru/123?keyword=walt+disney+s+leadership+style PDF link annotation
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/ed55e8a72.pdfIn PDF document text
    • https://tejigenunonim.weebly.com/uploads/1/3/0/8/130813632/suxelujaxosi.pdfIn PDF document text
    • https://luvatuxi.weebly.com/uploads/1/3/4/3/134321506/fubawijepinog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425727/normal_5f9e4530191b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402252/normal_5f93aba0ed030.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383798/normal_5f9f112fd12d6.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/fa2adb4e.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/gapas.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/a9134212.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fenomupiviro.files.wordpress.com/2020/11/big_eyes_emoticon.pdfIn PDF document text
    • https://pizenaluk.files.wordpress.com/2020/11/kiridebevadowaxunosim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2211bb7a-7f30-45ce-a9be-5f9df4e06a02/30183776838.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000085ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AE 5164 bytes
SHA-256: 9fe5447413ae12d1fcdbc51b603403937d4680a1915e6ca475dae6a3c279f491
font_01_sfnt_off00009747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9747 10380 bytes
SHA-256: 8b90bf5624de16f27bb9156a1ef8fd102885f587aea4df89c7e067674e440a1b