Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6fcf6e887c5fd8e…

MALICIOUS

PDF

69.9 KB Created: 2020-12-04 10:13:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: fa3e1c36c5b2d409bbc47c68815cc401 SHA-1: 2e9d1ba97ec898efa7de65b9138ccb631250611c SHA-256: d6fcf6e887c5fd8e73e58708642382d4fb5b4f804dbf9593ef9723ad176a2580
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://trafftec.ru/strik?utm_term=door+of+hope+san+diego PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448330/normal_5f9dc69c53dd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388280/normal_5fc097904d13e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418565/normal_5fbdd9d6cd514.pdfIn PDF document text
    • https://nepajomawowezuw.weebly.com/uploads/1/3/4/4/134462508/jovurobeganu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501486/normal_5fc6b28349512.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421783/normal_5fa1a8f6160e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443617/normal_5fad24c259530.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477620/normal_5fc15a64a9d37.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5ee5f8cdb769c6da7f7d/1606377190178/guppy_breeders_in_ohio.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/pegepolojeni.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/grade_12_chemistry_questions_and_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15df1e9fc3622d5255c20/t/5fc98d9d2ae1264a0389de12/1607044510342/rirexivalelutemigesiluwi.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/check_cashing_open_sunday.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/jurnal_akuntansi_manajemen_terbaru.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_off0000d306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD306 5272 bytes
SHA-256: 315cd31653759678f206b0d7009d6725eaed5e76cc78eda7bc4a849a3c52e2b7
font_01_sfnt_off0000e4f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F5 11268 bytes
SHA-256: 58be04bd228f3932b167ccc2f31dfb03ecfb54aff06323ae0684aee4dc901de6

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