Malicious PDF — malware analysis report

Static analysis result for SHA-256 45911fbb56edc888…

MALICIOUS

PDF

43.1 KB Created: 2020-10-11 17:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fae4f8607e2857a4c9ee94101a3f64e1 SHA-1: 664d2de215b517ae2fd576aba6eac864d5ca07f9 SHA-256: 45911fbb56edc8888c6a441719a27914bff0aef1515a7d7181aca684a715ca0c
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://ttraff.link/pify?keyword=goblin+diplomacy+runescape In PDF document text
    • http://files.mybakehouse.co.uk/uploads/1/3/0/7/130739532/1702876.pdfIn PDF document text
    • http://gobenatom.lafsgraduation.com/uploads/1/3/0/8/130873784/zemewobab-fifitudepodudu-wenam-fewiwuwerobudin.pdfIn PDF document text
    • http://guxot.grayscalecourses.com/uploads/1/3/1/4/131408024/b74679041d8de.pdfIn PDF document text
    • http://files.norwoodorchestra.com/uploads/1/3/1/4/131483386/9439040.pdfIn PDF document text
    • http://sezawiko.topspotfruitmart.com.au/uploads/1/3/1/3/131398064/254b2f47.pdfIn PDF document text
    • https://site-1036911.mozfiles.com/files/1036911/wonufoluju.pdfIn PDF document text
    • https://site-1043855.mozfiles.com/files/1043855/pemofemoluva.pdfIn PDF document text
    • https://site-1043291.mozfiles.com/files/1043291/25000782761.pdfIn PDF document text
    • https://site-1037111.mozfiles.com/files/1037111/75038625190.pdfIn PDF document text
    • https://site-1039162.mozfiles.com/files/1039162/95795100398.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/cc2da604-602b-439b-92e7-cc2501c34a4d/56611909499.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/796a6b8e-4cff-4408-ba1d-b270dfaf8b8f/jagajafitopasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/729a8fb2-4d5a-464e-9929-517699920de0/bubogide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f6caec5-2c7c-4ffa-8143-63ca63540aa4/wazomalegalosiragafovizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f940cea-c69c-44b2-abf6-67b865ce8020/sutudoka.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_off00006a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A57 5492 bytes
SHA-256: 9cc393d196e85323c97f2380f988cf02f9fa984334d5787f5b04e5b28b88eccb
font_01_sfnt_off00007ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CEB 10148 bytes
SHA-256: 04ac93f0410c4eba5e4407bae539681a42c4992efbfda12543c33b78af89eb54

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