Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b2bd52d68a34446…

MALICIOUS

PDF

64.3 KB Created: 2020-12-05 20:41:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 08c11a1d0b32930f1de547cc20c387dc SHA-1: d64af22786915027816a147c26541281d9d61de6 SHA-256: 4b2bd52d68a3444662f76ed5fc6ede20e8c458f6137546511fed798dbd299c92
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://traffnew.ru/123?utm_term=subject+and+predicate+worksheet PDF link annotation
    • https://pegebitejujag.weebly.com/uploads/1/3/4/4/134445458/piwaduj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475853/normal_5fb82ed1143e7.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/narolitefiz_gasapatasoda_mepenitaxux_nivegituju.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/vonuxagupeduze/angular_form_reset_one_field.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/kewobivewemosomosuguz.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/crispr_cas9_single_guide_rna.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/77627120668.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/datedif_function_in_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/chris_botti_cinema_paradiso_sheet_music.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b3f1d49dd12447331c2b/t/5fc18c06a97599144e321817/1606519814633/letter_to_my_future_sister_in_law_from_bride.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_off0000bd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD83 5604 bytes
SHA-256: a8b2f3c0d9cce9fd5512fd4e9b20e02f9d11643e17a204d19040a33ae91c320e
font_01_sfnt_off0000d0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A4 10680 bytes
SHA-256: 1c8b8aae756405531ad3f62d211d0472a8d28d4335444bc7e8b6a5ee81c4ac0f

Open this report in the interactive analyzer, or submit your own file for analysis.