Malicious PDF — malware analysis report

Static analysis result for SHA-256 563b38f600b02cba…

MALICIOUS

PDF

64.0 KB Created: 2020-11-06 22:18:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 778d98ab55d536c88d158eb04a551551 SHA-1: 251cd7ca50d3d727266d457faf5cb4aff2482019 SHA-256: 563b38f600b02cba31201ccea06e6a4ded1ff52e1c322423abf41ac0e9edfcc4
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=axis+football+unblocked+games+66 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385612/normal_5f9c51548054b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369183/normal_5f888063066aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_5f89836458712.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379601/normal_5f97834056ad2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413975/normal_5f947effa6800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404133/normal_5f9bdb5c6b7f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5f8c2abc551f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dorokani.files.wordpress.com/2020/11/ielts_band_9_essays.pdfIn PDF document text
    • https://tevarew.files.wordpress.com/2020/11/88608638079.pdfIn PDF document text
    • https://teviwuder.files.wordpress.com/2020/11/50730216800.pdfIn PDF document text
    • https://sexonilapaxo.files.wordpress.com/2020/11/52620415531.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/28265973414.pdfIn PDF document text
    • https://rotadenig.files.wordpress.com/2020/11/82236523173.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/37884695939.pdfIn PDF document text
    • https://fepefik.files.wordpress.com/2020/11/otobiyografi_nedir_rnekleri.pdfIn PDF document text
    • https://wemusow.files.wordpress.com/2020/11/kanthal_wire_gauge_guide.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_off0000b788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB788 5660 bytes
SHA-256: d6ed9510a97e759db52038c36ef9557417837a3e8d2962c754367a55b5d539f0
font_01_sfnt_off0000cacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACD 12116 bytes
SHA-256: 307182bd959aaa4303bd6ffd1a3206a829a9923fd72dc4097158db7a641e908d