Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f0f481d9bfba1f…

MALICIOUS

PDF

36.3 KB Created: 2020-11-06 17:48:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 5ca6eb6317f4ea9d0d57c77fb5135199 SHA-1: de9dddbf56fef24865aefe5a1aee8c6d470b7840 SHA-256: 80f0f481d9bfba1ffc6b3393942fbf33ff86ff9877cc767ab9ac283bf5d8327e
66 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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/aws?keyword=preterite+practice+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408598/normal_5f9f9ee64568d.pdfIn PDF document text
    • https://lavulujataj.weebly.com/uploads/1/3/4/5/134576306/7414616.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416921/normal_5f9bf2b6875b4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sepawi/39609581135.pdfIn PDF document text
    • https://xewuripew660320655.files.wordpress.com/2020/11/zewaxu.pdfIn PDF document text
    • https://wuzunujatipi.files.wordpress.com/2020/11/50453417444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7752dd27-485f-4cfe-b383-9835de22a642/16781694773.pdfIn PDF document text
    • https://xelinatuki.files.wordpress.com/2020/11/12873235441.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/kiwubowiku.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/balanced_scorecard_conceito.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/gibiseduxenowowadum.pdfIn PDF document text
    • https://punumovuzup.files.wordpress.com/2020/11/16950068939.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/82575128525.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_off00004f36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F36 5148 bytes
SHA-256: d0f356b9f1fa5fe438f8549b683a092b6dab5243a4363b51e0e9602bb5bd8d25
font_01_sfnt_off000060c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C4 10824 bytes
SHA-256: 7ea4aa44cf7af88dfd006e034981debc133e61378619ee41d2fd9fbcf61b2e71