Malicious PDF — malware analysis report

Static analysis result for SHA-256 23241997b1d3ac7b…

MALICIOUS

PDF

58.9 KB Created: 2020-12-14 15:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 60fa20a5d730f8d1a2913b2e69d04905 SHA-1: 238e0a49e2ddf9745ff1e54dcbdd97d1aafbaa9a SHA-256: 23241997b1d3ac7bfe06410c46834c2bd279badda8cca7c50c533694d58148c0
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a lure related to 'strategic group map template ppt'. The presence of an external URI strongly indicates an attempt to redirect the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=strategic+group+map+template+ppt PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401976/normal_5fa07ebc38d95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384639/normal_5fd661d801b1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415740/normal_5fb2a64fa468d.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/5fc112a36609fd0ee7924cd4/t/5fc6a6a13c6ccf69f34a01dc/1606854306766/amazon_seller_central_support_phone_number_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15c11ea4a794d564840ae/t/5fc89f5d8bd779356755c850/1606983517662/9815386622.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce45bc2c00fb1941508ac5/t/5fd1fd5debc7ce75e8b6f62e/1607597418895/68912116566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e146c0c3-f350-475e-bb1a-6004b7e5b243/6265019332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84e49af9-37f2-4abe-8d84-b6e922a9df0b/car_game_unblocked_99.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6ea03de-e507-4de8-bc30-2b2a1172af68/sports_head_hockey_championship.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_off0000ad8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD8F 5176 bytes
SHA-256: 12245d5ec227a9f827c7530c6f460b95b1f2547e706f6bdb0cba966f64d0c9d9
font_01_sfnt_off0000bf18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF18 9444 bytes
SHA-256: 1a13a6219730c3ae8c1823bf85fb749c86bd0783469cb046509fdb11e8a6bc6e