Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ba30c27bf8e426…

MALICIOUS

PDF

68.2 KB Created: 2020-12-11 20:19:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 048200d15818d972aa4b15878b33bf52 SHA-1: b5e4a1ec7395f17a8c4f87b97b6f438609d92005 SHA-256: d7ba30c27bf8e4265d9cb2cbb2302bc4e974c8b66f6f65d8011f8168bfde8c69
164 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 ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/strik?utm_term=unblocked+66+head+basketball PDF link annotation
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/2336584.pdfIn PDF document text
    • https://patekakedosejot.weebly.com/uploads/1/3/4/4/134479085/7158210.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480145/normal_5fd2ea6860968.pdfIn PDF document text
    • https://fofulusi.weebly.com/uploads/1/3/4/7/134774969/3233147.pdfIn PDF document text
    • https://gigojajalul.weebly.com/uploads/1/3/4/3/134320096/439345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416299/normal_5fb5521802fd2.pdfIn PDF document text
    • https://julupovopanar.weebly.com/uploads/1/3/4/7/134732987/kowuzele.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/5fc0cdab3398ff75152d912c/t/5fc2a27908845d0924e00076/1606591098338/kukaxes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c666116eb00e3c4b5099/t/5fc0eb4f4e98326c0231cf63/1606478671941/bubble_letter_happy_birthday.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc674e95bcb0228a2a8b315/t/5fcc0d325177ea328caf5e38/1607208242791/final_fantasy_dimensions_2_free_download_ios.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f319ab79f442f229e2d8/t/5fc342c73f75b166433da3c6/1606632152267/nijudomofebotuxe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf22af84361f7a2d9f336e/t/5fd00e5601d3ff2a5399d3ab/1607470679216/6790694496.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe23ccf8cdb769c6ac5dbc/1606296524934/vajosobubatawinupol.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18963085bf90c0e0195e8/t/5fc840d713de6e798154065e/1606959319958/skyscraper_movie_rating_uk.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_off0000cdbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBF 5280 bytes
SHA-256: 0008de357f3c1cc58d02842bf140168f2e235fa6619da58fda373892600e3ebb
font_01_sfnt_off0000dfae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAE 10552 bytes
SHA-256: 162ad5a445fd9b7173cb036988b96d65d3fe025e2109504893974d08ad637415

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